diff --git a/references.bib b/references.bib
index 98aa466..b2fa17f 100644
--- a/references.bib
+++ b/references.bib
@@ -6,6 +6,14 @@
 }
 
 @inproceedings{Handley2001a,
+  author={Mark Handley and Vern Paxson and Christian Kreibich},
+  title={Network Intrusion Detection: Evasion, Traffic Normalization, and {End-to-End} Protocol Semantics},
+  booktitle = {USENIX Security Symposium},
+  publisher = {USENIX},
+  year = {2001},
+  url = {https://www.usenix.org/legacy/events/sec01/full_papers/handley/handley.pdf},
+}
+
 @inproceedings{Wu2025a,
     author = {Mingshi Wu and Ali Zohaib and Zakir Durumeric and Amir Houmansadr and Eric Wustrow},
     title = {A Wall Behind A Wall: Emerging Regional Censorship in {China}},