diff --git a/references.bib b/references.bib
index 76d06b1..60beef1 100644
--- a/references.bib
+++ b/references.bib
@@ -1,3 +1,14 @@
+@article{Chang2022a,
+	author = {Keng-Chi Chang and William R. Hobbs and Margaret E. Roberts and Zachary C. Steinert-Threlkeld},
+	title = {{COVID-19} increased censorship circumvention and access to sensitive topics in {China}},
+	journal = {PNAS},
+	volume = {119},
+	number = {4},
+	publisher = {National Academy of Sciences},
+	year = {2022},
+	url = {https://www.pnas.org/content/pnas/119/4/e2102818119.full.pdf},
+}
+
 @inproceedings{Kaptchuk2021a,
 	author = {Gabriel Kaptchuk and Tushar M. Jois and Matthew Green and Aviel D. Rubin},
 	title = {{Meteor}: Cryptographically Secure Steganography for Realistic Distributions},