Add documentation of urcu

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

diff --git a/formal-model/urcu/references.txt b/formal-model/urcu/references.txt
index ca6798f8e4a89c9afc7a8b315e82f9a6bd57c3e7..72c67a2a08491fef6fe81a98cc1c4b0230188f94 100644 (file)
--- a/formal-model/urcu/references.txt
+++ b/formal-model/urcu/references.txt
@@ -5,3 +5,9 @@ http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
 http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
 http://spinroot.com/spin/Man/index.html
 http://spinroot.com/spin/Man/promela.html
+
+LTL vs CTL :
+
+http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
+http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
+  (downloaded)