diff --git a/sem/sem.bib b/sem/sem.bib
index ee7f4c5..835cbb8 100755
--- a/sem/sem.bib
+++ b/sem/sem.bib
@@ -77,6 +77,7 @@
   Number                   = {4},
   Pages                    = {47--52},
   Volume                   = {4},
+
   Journal                  = {IT Professional},
   Owner                    = {jim},
   Timestamp                = {2014.10.24}
@@ -295,7 +296,6 @@
   Author                   = {Kent, S. and Seo, K.},
   Institution              = {IETF},
   Year                     = {2005},
-  Language                 = {English},
   Type                     = {RFC},
 
   Organization             = {BBN Technologies},
@@ -327,6 +327,19 @@
   Timestamp                = {2013.10.29}
 }
 
+@Inproceedings{Kotuliak2011,
+  Title                    = {Performance comparison of {IPsec} and {TLS} based {VPN} technologies},
+  Author                   = {Kotuliak, I. and Rybar, P. and Truchly, P.},
+  Booktitle                = {9th International Conference on Emerging eLearning Technologies and Applications (ICETA)},
+  Date                     = {2011-10-27/2011-10-28},
+  Location                 = {Stara Lesna},
+  Organization             = {IEEE},
+  Pages                    = {217--221},
+
+  Owner                    = {jim},
+  Timestamp                = {2014.11.28}
+}
+
 @Article{Li,
   Title                    = {A Comparison of {CYK} and {Earley} {Parsing} {Algorithms}},
   Author                   = {Li, Te and Alagappan, Devi},
@@ -370,6 +383,7 @@
   Booktitle                = {Information security technical report},
   Year                     = {2006},
   Publisher                = {Elsevier},
+
   Journal                  = {information security technical report},
   Keywords                 = {IP, IPsec, network security, cryptography, key management},
   Owner                    = {jim},