wrusers.md

@@ -16,6 +16,10 @@
       - Timing system of LHAASO (Large High Altitude Air Shower
         Observation) project Deploying 10,000 detectors over 1 square km
         at Tibet.
+          - Abstract [*Sub-nanosecond Timing System Design and
+            Development for LHAASO
+            Project*](http://www.esrf.eu/icalepcs2011/html/auth0335.htm),
+            [ICALEPCS 2011 conference](http://icalepcs2011.esrf.eu)
 
 ## Thinking