@article{DBLP:journals/jct/ClarkJT11,
author = {David Clark and
Dieter Jungnickel and
Vladimir D. Tonchev},
title = {Affine geometry designs, polarities, and Hamada's conjecture},
journal = {J. Comb. Theory, Ser. A},
volume = {118},
number = {1},
year = {2011},
pages = {231-239},
ee = {http://dx.doi.org/10.1016/j.jcta.2010.06.007},
bibsource = {DBLP, http://dblp.uni-trier.de}
}