Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision 70eaa80b0f07a23246e87e901379056e4542937b)
+++ doc/bibliography/pl.bib	(revision 6eed619c3a4823cae4e1aa0fece8eb1c0cbcc591)
@@ -1091,4 +1091,13 @@
     year	= 2006,
     edition	= {4th},
+}
+
+@techreport{Prokopec11,
+  keywords = {ctrie, concurrent map},
+  contributer = {a3moss@uwaterloo.ca}, 
+  title={Cache-aware lock-free concurrent hash tries},
+  author={Prokopec, Aleksandar and Bagwell, Phil and Odersky, Martin},
+  institution={EPFL},
+  year={2011}
 }
 
@@ -1667,4 +1676,17 @@
     address	= {Redwood City},
     year	= 1991,
+}
+
+@inproceedings{Prokopec12,
+  keywords={ctrie, hash trie, concurrent map},
+  contributer={a3moss@uwaterloo.ca},
+  title={Concurrent tries with efficient non-blocking snapshots},
+  author={Prokopec, Aleksandar and Bronson, Nathan Grasso and Bagwell, Phil and Odersky, Martin},
+  booktitle={ACM SIGPLAN Notices},
+  volume={47},
+  number={8},
+  pages={151--160},
+  year={2012},
+  organization={ACM}
 }