diff --git a/header.tpl b/header.tpl
index 2f21be4..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: 2023-05-03</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 c47d98c..2bea607 100644
--- a/references.bib
+++ b/references.bib
@@ -1,48 +1,10 @@
-@article{razaghpanah2016a,
-	title        = {Exploring the Design Space of Longitudinal Censorship Measurement Platforms},
-	author       = {Abbas Razaghpanah and Anke Li and Arturo Filast{\`{o}} and Rishab Nithyanand and Vasilis Ververis and Will Scott and Phillipa Gill},
-	year         = {2016},
-	volume       = {abs/1606.01979},
-	eprinttype   = {arXiv},
-	eprint       = {1606.01979},
-	url          = {http://arxiv.org/abs/1606.01979},
-}
-
-@article{Ververis2017b,
-	title        = {Network interference in Latin America: Evaluating network measurements to detect information controls and Internet censorship},
-	author       = {Vasilis Ververis and Olga Khrustaleva and Eliana Quiroz},
-	year         = {2017},
-	month        = {11},
-	issn         = {2175-9596},
-	url          = {https://lavits.org/wp-content/uploads/2018/04/32-Vasilis-Ververis-Olga-Khrustaleva-e-Eliana-Quiroz.pdf},
-}
-
-@article{Ververis2020a,
-	title        = {Cross-Country Comparison of Internet Censorship: A Literature Review},
-	author       = {Ververis Vasilis and Marguel Sophia and Fabian Benjamin},
-	year         = {2020},
-	journal      = {Policy \& Internet},
-	publisher    = {Wiley Online Library},
-	volume       = {12},
-	number       = {4},
-	pages        = {450--473},
-    url          = {https://onlinelibrary.wiley.com/doi/full/10.1002/poi3.228},
-}
-
-@inproceedings{Ververis2021a,
-	title        = {Understanding Internet Censorship in Europe: The Case of Spain},
-	author       = {Vasilis Ververis and Tatiana Ermakova and Marios Isaakidis and Simone Basso and Benjamin Fabian and Stefania Milan},
-	year         = {2021},
-	booktitle    = {13th ACM Web Science Conference 2021},
-	location     = {Virtual Event, United Kingdom},
-	publisher    = {Association for Computing Machinery},
-	address      = {New York, NY, USA},
-	series       = {WebSci '21},
-	pages        = {319–328},
-	doi          = {10.1145/3447535.3462638},
-	isbn         = {9781450383301},
-	url          = {https://doi.org/10.1145/3447535.3462638},
-	numpages     = {10},
+@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,