diff --git a/resources/arxmliv-dataset-082017.md b/resources/arxmliv-dataset-082017.md
index 332d24b1c6ad44e38f7d2ac9ee30da357ddf2eb9..dcda75dc7a0c80016f857ad4a44c8cd294c76bca 100644
--- a/resources/arxmliv-dataset-082017.md
+++ b/resources/arxmliv-dataset-082017.md
@@ -69,7 +69,7 @@ concrete identifier.
   title = {arXMLiv:08.2017 dataset, an HTML5 conversion of arXiv.org},
   howpublished = {hosted at \url{https://sigmathling.kwarc.info/resources/arxmliv/}},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2018}
+  year = {2018}
 ```
 
 #### bibTeX for the bibLaTeX package (preferred)
@@ -79,7 +79,7 @@ concrete identifier.
   title = {arXMLiv:08.2017 dataset, an HTML5 conversion of arXiv.org},
   url = {https://sigmathling.kwarc.info/resources/arxmliv/},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2018}
+  year = {2018}
 ```
 
 #### EndNote
diff --git a/resources/arxmliv-dataset-082018.md b/resources/arxmliv-dataset-082018.md
index 7601fcbbf9b3fa7a917ed6b0f572141cc269f09a..ca0da737ef763c18f65e2b7b0a5de829e04e5ffc 100644
--- a/resources/arxmliv-dataset-082018.md
+++ b/resources/arxmliv-dataset-082018.md
@@ -68,7 +68,7 @@ concrete identifier.
   title = {arXMLiv:08.2018 dataset, an HTML5 conversion of arXiv.org},
   howpublished = {hosted at \url{https://sigmathling.kwarc.info/resources/arxmliv/}},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2018}
+  year = {2018}
 ```
 
 #### bibTeX for the bibLaTeX package (preferred)
@@ -78,7 +78,7 @@ concrete identifier.
   title = {arXMLiv:08.2018 dataset, an HTML5 conversion of arXiv.org},
   url = {https://sigmathling.kwarc.info/resources/arxmliv/},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2018}
+  year = {2018}
 ```
 
 #### EndNote
diff --git a/resources/arxmliv-dataset-082019.md b/resources/arxmliv-dataset-082019.md
index 6df240a32edab8582505b3c14c930b9a94079ce2..2fd8f56dd36b583a96c7d9fa74bbbb2d996cd04b 100644
--- a/resources/arxmliv-dataset-082019.md
+++ b/resources/arxmliv-dataset-082019.md
@@ -70,7 +70,7 @@ concrete identifier.
   title = {arXMLiv:08.2019 dataset, an HTML5 conversion of arXiv.org},
   howpublished = {hosted at \url{https://sigmathling.kwarc.info/resources/arxmliv-dataset-082019/}},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2019}
+  year = {2019}
 ```
 
 #### bibTeX for the bibLaTeX package (preferred)
@@ -80,7 +80,7 @@ concrete identifier.
   title = {arXMLiv:08.2019 dataset, an HTML5 conversion of arXiv.org},
   url = {https://sigmathling.kwarc.info/resources/arxmliv-dataset-082019/},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2019}
+  year = {2019}
 ```
 
 #### EndNote
diff --git a/resources/arxmliv-dataset-2020.md b/resources/arxmliv-dataset-2020.md
index fcb86ce9f5d8682b4fe0754cdc16035dedad3ba4..51ab89fbd06c3f30ea344e839c31602b56db8969 100644
--- a/resources/arxmliv-dataset-2020.md
+++ b/resources/arxmliv-dataset-2020.md
@@ -37,7 +37,7 @@ This version of the dataset has had minimal manual quality control, and we offer
   title = {arXMLiv:2020 dataset, an HTML5 conversion of arXiv.org},
   howpublished = {hosted at \url{https://sigmathling.kwarc.info/resources/arxmliv-dataset-2020/}},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2020}
+  year = {2020}
 ```
 
 #### bibTeX for the bibLaTeX package (preferred)
@@ -47,7 +47,7 @@ This version of the dataset has had minimal manual quality control, and we offer
   title = {arXMLiv:2020 dataset, an HTML5 conversion of arXiv.org},
   url = {https://sigmathling.kwarc.info/resources/arxmliv-dataset-2020/},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2020}
+  year = {2020}
 ```
 
 #### EndNote
diff --git a/resources/arxmliv-statements-082018.md b/resources/arxmliv-statements-082018.md
index 45099a16d4d3bde1ca8d22fd8b33c9380ca71445..2a4d68468a3d534b1c219b374b2cf220361ccc0c 100644
--- a/resources/arxmliv-statements-082018.md
+++ b/resources/arxmliv-statements-082018.md
@@ -75,7 +75,7 @@ nomath source: `definition/35b170bae4259a5c430846116142d4e4a45097e52daf818b78ea3
   title = {Statement classification dataset, 10.5 million plain-text paragraphs from {arXMLiv:08.2018}},
   howpublished = {\url{https://sigmathling.kwarc.info/resources/arxmliv-statements-082018/}},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2019}
+  year = {2019}
 ```
 
 #### bibTeX for the bibLaTeX package (preferred)
@@ -85,7 +85,7 @@ nomath source: `definition/35b170bae4259a5c430846116142d4e4a45097e52daf818b78ea3
   title = {Statement classification dataset, 10.5 million plain-text paragraphs from {arXMLiv:08.2018}},
   url = {https://sigmathling.kwarc.info/resources/arxmliv-statements-082018/},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2019}
+  year = {2019}
 ```
 
 #### EndNote
diff --git a/resources/ntcir.md b/resources/ntcir.md
index 28c0112c6a61bede424da8f5df409895d5123687..c8b5cc8b064aa2ef0240c8eb03a84b83956e4689 100644
--- a/resources/ntcir.md
+++ b/resources/ntcir.md
@@ -28,5 +28,5 @@ If you are a member, you should have access to the two repositories containing t
   title = {NTCIR math information retrieval task data},
   url = {https://sigmathling.kwarc.info/resources/ntcir/},
   note = {SIGMathLing -- Special Interest Group on Math Linguistics},
-  year = 2021}
+  year = {2021}
 ```