Add one paper: Ptacek1998a.

Author: gfw-report

references.bib

@@ -1,3 +1,11 @@
+@techreport{Ptacek1998a,
+  author={Thomas H. Ptacek and Timothy N. Newsham},
+  title={Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection},
+  year={1998},
+  url={https://www.icir.org/vern/Ptacek-Newsham-Evasion-98.pdf},
+}
+
+@inproceedings{Handley2001a,
 @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}},