diff --git a/header.tpl b/header.tpl
index b71806e..bde3679 100644
--- a/header.tpl
+++ b/header.tpl
@@ -189,7 +189,7 @@
           <div class="menu-item">
             <img class="top-icon" src="img/update-icon.svg" alt="update icon"/>
             <a
-            href="https://github.com/NullHypothesis/censorbib/commits/master">Last update: 2023-09-16</a>
+            href="https://github.com/NullHypothesis/censorbib/commits/master">Last update: 2023-10-05</a>
           </div>
           <div class="menu-item">
             <img class="top-icon" src="img/donate-icon.svg" alt="donate icon"/>
diff --git a/references.bib b/references.bib
index e390de9..f4396a4 100644
--- a/references.bib
+++ b/references.bib
@@ -1,3 +1,11 @@
+@article{Ververis2023a,
+	author = {Ververis, Vasilis and Lasota, Lucas and Ermakova, Tatiana and Fabian, Benjamin},
+	title = {Website blocking in the European Union: Network interference from the perspective of Open Internet},
+	journal = {Policy \& Internet},
+	year = {2023},
+	url = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/poi3.367},
+}
+
 @techreport{Fifield2023b,
 	author = {David Fifield},
 	title = {Comments on certain past cryptographic flaws affecting fully encrypted censorship circumvention protocols},