diff --git a/header.tpl b/header.tpl
index b90780d..1b8667a 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: 2023-04-24</a>
+            href="https://github.com/NullHypothesis/censorbib/commits/master">Last update: 2023-05-06</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 1b0fba4..2bea607 100644
--- a/references.bib
+++ b/references.bib
@@ -1,3 +1,12 @@
+@inproceedings{Ramesh2023a,
+	author = {Reethika Ramesh and Sundara Raman, Ram and Apurva Virkud and Alexandra Dirksen and Armin Huremagic and David Fifield and Dirk Rodenburg and Rod Hynes and Doug Madory and Roya Ensafi},
+	title = {Network Responses to {Russia's} Invasion of {Ukraine} in 2022: A Cautionary Tale for {Internet} Freedom},
+	booktitle = {USENIX Security Symposium},
+	publisher = {USENIX},
+	year = {2023},
+	url = {https://censoredplanet.org/assets/russia-ukraine-invasion.pdf},
+}
+
 @inproceedings{Wu2023a,
 	author = {Mingshi Wu and Jackson Sippe and Danesh Sivakumar and Jack Burg and Peter Anderson and Xiaokang Wang and Kevin Bock and Amir Houmansadr and Dave Levin and Eric Wustrow},
 	title = {How the {Great Firewall} of {China} Detects and Blocks Fully Encrypted Traffic},