BibTex format
@article{Evans:2011:10.1016/j.jalgebra.2010.12.004,
author = {Evans, DM and Pastori, E},
doi = {10.1016/j.jalgebra.2010.12.004},
journal = {Journal of Algebra},
pages = {221--233},
title = {Second cohomology groups and finite covers of infinite symmetric groups},
url = {http://dx.doi.org/10.1016/j.jalgebra.2010.12.004},
volume = {330},
year = {2011}
}