Hi, One more note about "et al.": the period can get duplicated. For example: Mohammad Allahbakhsh, Aleksandar Ignjatovic, Boualem Bena- tallah, Seyed-Mehdi-Reza Beheshti and Norman Foo et al.. An analytic approach to people evaluation in crowdsourcing systems. @article{allahbakhsh@crowdsourcing, author={Mohammad Allahbakhsh and Aleksandar Ignjatovic and Boualem Benatallah and Seyed{-}Mehdi{-}Reza Beheshti and Norman Foo and Elisa Bertino}, title={An Analytic Approach to People Evaluation in Crowdsourcing Systems}, journal={CoRR}, year={2012}, volume={abs/1211.3200}, timestamp={Tue, 16 Sep 2014 19:27:03 +0200}, biburl={http://dblp.uni-trier.de/rec/bib/journals/corr/abs-1211-3200}, bibsource={dblp computer science bibliography, http://dblp.org}, url={http://arxiv.org/abs/1211.3200}, } There should only be one period. I think this was mentioned a while back and might be related to removing the period in cases where punctuation (such as a question mark) already exists.