diff --git a/_includes/people_chip.html b/_includes/people_chip.html
index ea01f3c3c5efa7dd6092ec8b219556c891131dde..de912b70d0ff7f6010bf8ae69b6539d9d18e71a7 100644
--- a/_includes/people_chip.html
+++ b/_includes/people_chip.html
@@ -14,9 +14,7 @@
         </div>
     </a>
 {% else %}
-    <a href="{{ site.baseurl }}{{purl}}">
-        <div class="chip">
-            {{person}}
-        </div>
-    </a>
+    <div class="chip">
+        {{person}}
+    </div>
 {% endif %}
\ No newline at end of file
diff --git a/courses/AIProj.md b/courses/AIProj.md
index 072174b148cd58d50913a1c84170f46b5f47b429..3bf756ea3ea7895e9a88d1749fb974e30ca0dfad 100644
--- a/courses/AIProj.md
+++ b/courses/AIProj.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Projekt zur Künstlichen Intelligenz
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 semesters: 
     - WS17/18
diff --git a/courses/GenICT1.md b/courses/GenICT1.md
index a79cfb7cd008917898981b9634ba617501bc2174..90bbc84fc3ecd7effc377f9037dabf98d4d281bf 100644
--- a/courses/GenICT1.md
+++ b/courses/GenICT1.md
@@ -7,7 +7,7 @@ instructor:
 - Prof.  Jürgen Schönwälder
 - Prof. Peter Baumann
 - Prof. Herbert Jaeger
-	
+    
 organization: Jacobs University
 semesters:
 - Fall14
diff --git a/courses/GenICT2.md b/courses/GenICT2.md
index d60f2eb2048c55bed28401e8fa2bfc9c8676a94f..5e6e3b67a2521fcf6526090fd26837f5fc75c105 100644
--- a/courses/GenICT2.md
+++ b/courses/GenICT2.md
@@ -7,7 +7,7 @@ instructor:
 - Prof.  Jürgen Schönwälder
 - Prof. Peter Baumann
 - Prof. Herbert Jaeger
-	
+    
 organization: Jacobs University
 semesters:
 - Spring15
diff --git a/courses/KRMT.md b/courses/KRMT.md
index 7b8ea74ad811b7e901cb78223f456c4b020bc4e1..82df600725973d51a471b7af8d8d525a0d7d9cb9 100644
--- a/courses/KRMT.md
+++ b/courses/KRMT.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Logik-Basierte Wissensrepräsentation für Mathematisch/Technisches Wissen
 instructor:
-	- omkohlhase
+    - omkohlhase
 
 semesters:
     - SS17
diff --git a/courses/ai.md b/courses/ai.md
index 3baeb291b05000caaea85eb2833453a37201e3fb..ce07f6b1ca515a89d85c2058e73f3541c7383b38 100644
--- a/courses/ai.md
+++ b/courses/ai.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Artificial Intelligence
 instructor:
-	- mkohlhase
+    - mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/ai1.md b/courses/ai1.md
index 6ffb4686689fcd6c9f1bf94fb77d569ba638a139..b3e41253665a4527597cc9cac13fabb020f6fe27 100644
--- a/courses/ai1.md
+++ b/courses/ai1.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Künstliche Intelligenz I
 instructor:
-	- mkohlhase
+    - mkohlhase
 
 semesters:
     - WS16/17
diff --git a/courses/ai2.md b/courses/ai2.md
index 742df1a3e2db951e5116c02856612874971c536a..7bf7ebdd49ef68170f7d845007e5105b8ed20c33 100644
--- a/courses/ai2.md
+++ b/courses/ai2.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Künstliche Intelligenz II
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 semesters:
     - SS17
diff --git a/courses/complog.md b/courses/complog.md
index 01a6dc384c60d2f4bcb0904f27e44ad8364d8dbd..0cdfb89dbf6efbbccd2eadbe094bad71a579d42e 100644
--- a/courses/complog.md
+++ b/courses/complog.md
@@ -3,10 +3,10 @@ layout: course
 
 title: Computational Logic
 instructor:
-	- mkohlhase
+  - mkohlhase
     - frabe
     - dmueller
-	
+    
 organization: Jacobs University
 semesters:
     - Fall05
diff --git a/courses/comsem.md b/courses/comsem.md
index 5de02df2dff0235643a413bd00b1c56b157b6217..6d122e0afcbaf402ce10106b682e7231bb500d03 100644
--- a/courses/comsem.md
+++ b/courses/comsem.md
@@ -3,8 +3,8 @@ layout: course
 
 title: Computational Natural Language Semantics
 instructor:
-	- mkohlhase
-	
+  - mkohlhase
+    
 organization: Jacobs University
 semesters:
     - Fall06
diff --git a/courses/dbwa.md b/courses/dbwa.md
index da336d338797e5b76172b0c02f507b8011ffabf8..914c28ffb751bdc703316754edffe4cc121d4df7 100644
--- a/courses/dbwa.md
+++ b/courses/dbwa.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Data Bases and Web Applications
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/dynamics.md b/courses/dynamics.md
index 176ec62a55471935013b09c86ada3a10ed4d4528..de9437c798acd110c9adf02dccfe50bfa31bdf36 100644
--- a/courses/dynamics.md
+++ b/courses/dynamics.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Representing Dynamics and Dynamic Representation 
 instructor:
-	- mkohlhase
+  - mkohlhase
     - Herber Jaeger, Jacocbs University
 
 organization: Jacobs University
diff --git a/courses/gencs.md b/courses/gencs.md
index 170fcc7d71067238cfe3d28facaae12f2c3feb5d..879c138d890462645e7b893cbbbc0b3c52077870 100644
--- a/courses/gencs.md
+++ b/courses/gencs.md
@@ -3,7 +3,7 @@ layout: course
 
 title: General Computer Science
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/gencs1.md b/courses/gencs1.md
index 279b1a67335481af08b3b74a864fd3b03ffe515a..4409046b4bd2fa7ce02451d0351009ba6a931387 100644
--- a/courses/gencs1.md
+++ b/courses/gencs1.md
@@ -3,7 +3,7 @@ layout: course
 
 title: General Computer Science I
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/gencs2.md b/courses/gencs2.md
index 443966cbd8146a4dd263efaf2c5ec05db826e61a..b549737a0b09f32817ad191cce0ed593c0b04ad3 100644
--- a/courses/gencs2.md
+++ b/courses/gencs2.md
@@ -3,7 +3,7 @@ layout: course
 
 title: General Computer Science II
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/krsw.md b/courses/krsw.md
index 889a0decfe2b355b1e3c5045950794cea4b7c444..a5f5ce8f361e41b8ad3f2dec47ae7e26aa582043 100644
--- a/courses/krsw.md
+++ b/courses/krsw.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Research Seminar -  Knowledge Representation and Semantic Web
 instructor:
-	- mkohlhase
+  - mkohlhase
     - frabe
 
 organization: Jacobs University
diff --git a/courses/lbs.md b/courses/lbs.md
index ee5a768a8cce9ce22d952ad8ea123295e407b0bd..5a42c472d582c1f94a97b0e33ccb6de635bca6ef 100644
--- a/courses/lbs.md
+++ b/courses/lbs.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Logik-Basierte Sprachverarbeitung (LBS)
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 semesters:
     - WS17/18
diff --git a/courses/meta/former.md b/courses/meta/former.md
index bce4fe5dbc4f1d0d66cdd91e29e48fc1d62ba11d..b20acc55ee8131740129dac274fe36af7fcabd5a 100644
--- a/courses/meta/former.md
+++ b/courses/meta/former.md
@@ -10,6 +10,6 @@ permalink: /courses/former/
     {% for item in courses %}
       {% unless item.semesters contains site.semester %}
             {% include course.html %}
-	  {% endunless %}
+      {% endunless %}
     {% endfor %}
 </ul>
diff --git a/courses/meta/upcoming.md b/courses/meta/upcoming.md
index 62159d818f58a8694ad9d02c810b310a96773ba0..193ad34ee93c384fe050915eef653e2ea2cf45cc 100644
--- a/courses/meta/upcoming.md
+++ b/courses/meta/upcoming.md
@@ -12,4 +12,4 @@ permalink: /courses/upcoming/
             {% include course.html %}
         {% endif %}
     {% endfor %}
-</ul>
+</ul>
\ No newline at end of file
diff --git a/courses/tdm.md b/courses/tdm.md
index 8feee564cb23e6ecdc45404af3979eeda169cf3f..27fe692f0bc2dc98f492f4a2465d8ea01bb78ae4 100644
--- a/courses/tdm.md
+++ b/courses/tdm.md
@@ -1,9 +1,9 @@
 ---
 layout: course
 
-title: University Study Course: Text and Digital Media
+title: "University Study Course: Text and Digital Media"
 instructor:
-	- mkohlhase
+    - mkohlhase
     - Prof. Thomas Rommel, Jacobs University
 
 organization: Jacobs University
diff --git a/courses/ttt.md b/courses/ttt.md
index 2a49c32418446e38c29f3bbe32afc6be95908389..80534176a8a7b363f90c43e3293dbe7fe92c250f 100644
--- a/courses/ttt.md
+++ b/courses/ttt.md
@@ -1,14 +1,14 @@
 ---
 layout: course
 
-title: University Study Course - From the Textual to the Technological: Documents and Structure in a Digital Age
+title: "University Study Course - From the Textual to the Technological: Documents and Structure in a Digital Age"
 instructor:
-- mkohlhase
-- Dr. Giselda Baudin 
-	
+    - mkohlhase
+    - Dr. Giselda Baudin 
+
 organization: Jacobs University
 semesters:
     - Intersession 2014
 ---
 An interdisciplinary Introduction to the structure and management of Text and Digial
-Media. 
+Media.
diff --git a/courses/wuv.md b/courses/wuv.md
index 88285e34c798319c36ad3ade2b5690814f5831ff..da72a1790d374e09b7c98e73d1cf92e38459abdd 100644
--- a/courses/wuv.md
+++ b/courses/wuv.md
@@ -3,7 +3,7 @@ layout: course
 
 title: Seminar Wissensrepräsentation und -verarbeitung
 instructor:
-	- mkohlhase
+  - mkohlhase
 
 semesters:
     - SS17
diff --git a/people/cdavid.md b/people/cdavid.md
index a69939bbd30dbbe0ba8411ebe1ff95bd6bcf06f9..bb6fda852b9e5f1da333a4f1f7d4d6a5c11b10c4 100644
--- a/people/cdavid.md
+++ b/people/cdavid.md
@@ -23,6 +23,6 @@ systems, bringing semantic web concepts in everyday desktop software (SiSsi).
  
 ### Research Focus
 I am interested in representation of mathematics on the Internet, as well as User Interaction (UI) and eXperience (UX).
-	
+    
 ### Thesis Title
 Semantic Alliance Framework: Integrating Documents and Semantic Service 
diff --git a/projects/odk.md b/projects/odk.md
index 486c6356e40d42f49032b0dc3d2010569f5123da..c996898f45af0ce9a854e243d1603a79d88d99ab 100644
--- a/projects/odk.md
+++ b/projects/odk.md
@@ -15,7 +15,7 @@ people:
     - miancu
     - cmaeder
     - dmueller
-	
+
 funding: EU
 program: Research Infrastructure
 grantid: 676541
diff --git a/projects/tetrapod.md b/projects/tetrapod.md
index 483d946adff681f921c5c097100469860fd47a81..b0f5824fedb9b71762c67bd2822f1d8f1e8b49cc 100644
--- a/projects/tetrapod.md
+++ b/projects/tetrapod.md
@@ -10,7 +10,7 @@ start_date: '2011-12'
 people:
     - mkohlhase
     - dmueller
-	- frabe
+    - frabe
 ---
 
 The aim of the Tetrapod project is to produce tools for **trustworthy and efficient
diff --git a/research/index.md b/research/index.md
index 7d0aa21fb08e1ef59a1e917efb87af249e390a07..29fee8484f8b626a491ced7eb11a76490f7fd0cb 100644
--- a/research/index.md
+++ b/research/index.md
@@ -11,56 +11,56 @@ menu_order: 101
   <tbody>
     <tr>
       <td colspan="3">
-	<span style="font-weight:bold">Applications</span>
-	eMath 3.0,
-	<a href="https://planetary.mathweb.org">Active Documents</a>,
-	<a href="https://trac.kwarc.info/sissi">Semantic Spreadsheets</a>,
-	<a href="https://trac.kwarc.info/FormalCAD">Semantic CAD/CAM</a>,
-	Semantic Help Systems, Change Mangagement, ...
+    <span style="font-weight:bold">Applications</span>
+    eMath 3.0,
+    <a href="https://planetary.mathweb.org">Active Documents</a>,
+    <a href="https://trac.kwarc.info/sissi">Semantic Spreadsheets</a>,
+    <a href="https://trac.kwarc.info/FormalCAD">Semantic CAD/CAM</a>,
+    Semantic Help Systems, Change Mangagement, ...
       </td>
     </tr>
     <tr>
       <td>
-	<span style="font-weight:bold">Foundations of Mathematics</span>
-	<ul>
-	  <li><a href="https://omdoc.org">OMDoc</a></li>
-	  <li>advanced Type Theories</li>
-	  <li><a href="http://uniformal.github.io">MMT: Modular Math Theories</a></li>
-	  <li><a href="http://trac.omodoc.org/LATIN">Logic Morphisms/Atlas</a></li>
-	  <li>Theorem Prover Interoperability</li>
-	</ul>
+    <span style="font-weight:bold">Foundations of Mathematics</span>
+    <ul>
+      <li><a href="https://omdoc.org">OMDoc</a></li>
+      <li>advanced Type Theories</li>
+      <li><a href="http://uniformal.github.io">MMT: Modular Math Theories</a></li>
+      <li><a href="http://trac.omodoc.org/LATIN">Logic Morphisms/Atlas</a></li>
+      <li>Theorem Prover Interoperability</li>
+    </ul>
       </td>
       <td>
-	<a href="http://kwarc.info/research/kminteract"><span style="font-weight:bold">Knowledge Mgt. &amp; Interaction</span></a>
-	<ul>
-	  <li>Semantic Interpretation</li>
-	  <li><a href="https://trac.omdoc.org/JOBAD">JOBAD: Document-Embedded Interaction</a></li>
-	  <li><a href="https://trac.mathweb.org/tntbase">TNTBase: Versioned XML Storage</a></li>
-	  <li><a href="http://trac.mathweb.org/MWS">Math Web Search</a></li>
-	  <li>Math Archives</li>
-	</ul>
+    <a href="http://kwarc.info/research/kminteract"><span style="font-weight:bold">Knowledge Mgt. &amp; Interaction</span></a>
+    <ul>
+      <li>Semantic Interpretation</li>
+      <li><a href="https://trac.omdoc.org/JOBAD">JOBAD: Document-Embedded Interaction</a></li>
+      <li><a href="https://trac.mathweb.org/tntbase">TNTBase: Versioned XML Storage</a></li>
+      <li><a href="http://trac.mathweb.org/MWS">Math Web Search</a></li>
+      <li>Math Archives</li>
+    </ul>
       </td>
       <td>
-	<a href="http://kwarc.info/research/semantization">
-	  <span style="font-weight:bold">Semantization</span>
-	</a>
-	<ul>
-	  <li><a href="http://github.com/brucemiller/LaTeXML">LaTeX --&gt; XML</a></li>
-	  <li><a href="http://github.com/KWARC/sTeX">sTeX: Semantic LaTeX</a></li>
-	  <li>invasive editors</li>
-	  <li>Context-Aware IDEs</li>
-	  <li>Mathematical Corpora</li>
-	  <li><a href="https://github.com/KWARC/llamapun">Linguistics of Math</a></li>
-	</ul>
+    <a href="http://kwarc.info/research/semantization">
+      <span style="font-weight:bold">Semantization</span>
+    </a>
+    <ul>
+      <li><a href="http://github.com/brucemiller/LaTeXML">LaTeX --&gt; XML</a></li>
+      <li><a href="http://github.com/KWARC/sTeX">sTeX: Semantic LaTeX</a></li>
+      <li>invasive editors</li>
+      <li>Context-Aware IDEs</li>
+      <li>Mathematical Corpora</li>
+      <li><a href="https://github.com/KWARC/llamapun">Linguistics of Math</a></li>
+    </ul>
       </td>
     </tr>
     <tr>
       <td colspan="3">
-	<span style="font-weight:bold">Foundations:</span>
-	Computational Logic,
-	<a href="/formal-methods">Formal Methods</a>,
-	<a href="http://www.w3.org/TR/MathML3/">MathML</a>,
-	<a href="http://openmath.org">OpenMath</a>
+    <span style="font-weight:bold">Foundations:</span>
+    Computational Logic,
+    <a href="/formal-methods">Formal Methods</a>,
+    <a href="http://www.w3.org/TR/MathML3/">MathML</a>,
+    <a href="http://openmath.org">OpenMath</a>
       </td>
     </tr>
   </tbody>
diff --git a/systems/mmt.md b/systems/mmt.md
index 480c2698a0b9c70d131766ed34ceef8e2209f13f..c56e2c68c7e5560094fe4d7ce828fb5ae63aec3f 100644
--- a/systems/mmt.md
+++ b/systems/mmt.md
@@ -15,9 +15,9 @@ people:
 
 supported-by:
     - oaf
-	- okd
-	- latin
-	- mathsearch
+    - okd
+    - latin
+    - mathsearch
 
 website: https://uniformal.github.io/
 repository: https://github.com/Uniformal/MMT