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-rw-r--r--bubger.19
1 files changed, 9 insertions, 0 deletions
diff --git a/bubger.1 b/bubger.1
index 0e5d7fe..4edfd36 100644
--- a/bubger.1
+++ b/bubger.1
@@ -338,6 +338,15 @@ bubger		TO "list+bubger@causal.agency"
 .%U https://tools.ietf.org/html/rfc4287
 .%D December 2005
 .Re
+.It
+.Rs
+.%A J. Snell
+.%T Atom Threading Extensions
+.%I IETF
+.%R RFC 4685
+.%U https://tools.ietf.org/html/rfc4685
+.%D September 2006
+.Re
 .El
 .
 .Sh AUTHORS