git subrepo pull (merge) lib/kbibs

subrepo:
  subdir:   "lib/kbibs"
  merged:   "603e91b5"
upstream:
  origin:   "git@github.com:KWARC/bibs.git"
  branch:   "master"
  commit:   "14704f24"
git-subrepo:
  version:  "0.4.0"
  origin:   "git@github.com:ingydotnet/git-subrepo.git"
  commit:   "5d6aba9"

lib/kbibs/.gitrepo

@@ -6,7 +6,7 @@
 [subrepo]
 	remote = git@github.com:KWARC/bibs.git
 	branch = master
-	commit = f21adc164bf14abf3f715018baeaecaba1f571e0
+	commit = 14704f24d2c70910f251f21f59e4d4c1a34d57ed
 	parent = 38bdd47fc690489d66053314060d031a07730161
 	method = merge
 	cmdver = 0.4.0

lib/kbibs/extpubs.bib

@@ -508,6 +508,14 @@ abstract="Manifest fields in a type of modules are shown to be expressible in in
 isbn="978-3-642-02444-3"
 }
+@ARTICLE{Liskov94abehavioral,
+    author = {Barbara H. Liskov and Jeanette M. Wing},
+    title = {A Behavioral Notion of Subtyping},
+    journal = {ACM Transactions on Programming Languages and Systems},
+    year = {1994},
+    volume = {16},
+    pages = {1811--1841}
+}
   
 @online{gloin:on,crossref={gloin:base},
   label = {GLO},

lib/kbibs/kwarc.bib

@@ -60,6 +60,11 @@
 @STRING{spring   = "Springer-Verlag"}
 @STRING{JWS = {Web Semantics: Science, Services and Agents on the World Wide Web}}
+@online{cocalc:on,
+  label = {CC},
+  title = {{CoCalc}: Collaborative Calculation in the Cloud},
+  url = {https://cocalc.com},
+  urldate = {2019-01-28}}
 @online{wikidata:on,
   label = {WD},
   title = {Wikidata:Introduction},
@@ -551,6 +556,14 @@ abstract="Manifest fields in a type of modules are shown to be expressible in in
 isbn="978-3-642-02444-3"
 }
+@ARTICLE{Liskov94abehavioral,
+    author = {Barbara H. Liskov and Jeanette M. Wing},
+    title = {A Behavioral Notion of Subtyping},
+    journal = {ACM Transactions on Programming Languages and Systems},
+    year = {1994},
+    volume = {16},
+    pages = {1811--1841}
+}
   
 @online{gloin:on,crossref={gloin:base},
   label = {GLO},