diff --git a/bib/sivanov.bib b/bib/sivanov.bib
index de053e3..d7d6b40 100644
--- a/bib/sivanov.bib
+++ b/bib/sivanov.bib
@@ -14,6 +14,50 @@
   bibsource = {dblp computer science bibliography, http://dblp.org}
 }
 
+@inproceedings{DBLP:conf/mcu/0001V15,
+  author    = {Sergiu Ivanov and
+               Sergey Verlan},
+  editor    = {J{\'{e}}r{\^{o}}me Durand{-}Lose and
+               Benedek Nagy},
+  title     = {Universality of Graph-controlled Leftist Insertion-deletion Systems
+               with Two States},
+  booktitle = {Machines, Computations, and Universality - 7th International Conference,
+               {MCU} 2015, Famagusta, North Cyprus, September 9-11, 2015, Proceedings},
+  series    = {Lecture Notes in Computer Science},
+  volume    = {9288},
+  pages     = {79--93},
+  publisher = {Springer},
+  year      = {2015},
+  url       = {http://dx.doi.org/10.1007/978-3-319-23111-2_6},
+  doi       = {10.1007/978-3-319-23111-2_6},
+  timestamp = {Sun, 30 Aug 2015 12:51:09 +0200},
+  biburl    = {http://dblp.uni-trier.de/rec/bib/conf/mcu/0001V15},
+  bibsource = {dblp computer science bibliography, http://dblp.org}
+}
+
+@inproceedings{DBLP:conf/uc/Freund0S15,
+  author    = {Rudolf Freund and
+               Sergiu Ivanov and
+               Ludwig Staiger},
+  editor    = {Cristian S. Calude and
+               Michael J. Dinneen},
+  title     = {Going Beyond Turing with {P} Automata: Partial Adult Halting and Regular
+               Observer {\(\omega\)}-Languages},
+  booktitle = {Unconventional Computation and Natural Computation - 14th International
+               Conference, {UCNC} 2015, Auckland, New Zealand, August 30 - September
+               3, 2015, Proceedings},
+  series    = {Lecture Notes in Computer Science},
+  volume    = {9252},
+  pages     = {169--180},
+  publisher = {Springer},
+  year      = {2015},
+  url       = {http://dx.doi.org/10.1007/978-3-319-21819-9_12},
+  doi       = {10.1007/978-3-319-21819-9_12},
+  timestamp = {Fri, 07 Aug 2015 09:19:26 +0200},
+  biburl    = {http://dblp.uni-trier.de/rec/bib/conf/uc/Freund0S15},
+  bibsource = {dblp computer science bibliography, http://dblp.org}
+}
+
 @article{DBLP:journals/fuin/AlhazovF014,
   author    = {Artiom Alhazov and
                Rudolf Freund and
@@ -171,7 +215,7 @@
   year      = {2013},
   url       = {http://dx.doi.org/10.4204/EPTCS.128.14},
   doi       = {10.4204/EPTCS.128.14},
-  timestamp = {Tue, 06 May 2014 01:00:00 +0200},
+  timestamp = {Thu, 03 Sep 2015 11:21:30 +0200},
   biburl    = {http://dblp.uni-trier.de/rec/bib/journals/corr/FreundIOS13},
   bibsource = {dblp computer science bibliography, http://dblp.org}
 }