@article{DBLP:journals/jct/HanL07,
author = {Guangguo Han and
Huiling Li},
title = {Unsolvable block transitive automorphism groups of 2-({\it v},
5, 1) designs},
journal = {J. Comb. Theory, Ser. A},
volume = {114},
number = {1},
year = {2007},
pages = {77-96},
ee = {http://dx.doi.org/10.1016/j.jcta.2006.01.009},
bibsource = {DBLP, http://dblp.uni-trier.de}
}