diff --git a/doc/cookbook/source/references.bib b/doc/cookbook/source/references.bib
index e943c15d77c..2fcd0256d1e 100644
--- a/doc/cookbook/source/references.bib
+++ b/doc/cookbook/source/references.bib
@@ -22,7 +22,7 @@ @book{Rasmussen2005GPM
   author = {Rasmussen, C. E. and Williams, C. K. I.},
   title = {Gaussian Processes for Machine Learning (Adaptive Computation and Machine Learning)},
   year = {2005},
-  publisher = {The MIT Press}
+  publisher = {The MIT Press},
   year={2008},
 }
 
@@ -101,6 +101,7 @@ @inproceedings{shalev2011shareboost
   booktitle={Advances in Neural Information Processing Systems},
   pages={1179--1187},
   year={2011}
+}
 
 @inproceedings{gretton2012optimal,
   author={Gretton, A. and Sriperumbudur, B. and Sejdinovic, D. and Strathmann, H. and Balakrishnan, S. and Pontil, M. and Fukumizu, K.},