@article{01537382,
title = {Frequency squares and affine designs.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {7},
year = {2000},
zbl = {0961.05009},
language = {en},
url = {http://dml.mathdoc.fr/item/01537382}
}
Mavron, V.C. Frequency squares and affine designs.. The Electronic Journal of Combinatorics [electronic only], Tome 7 (2000) . http://gdmltest.u-ga.fr/item/01537382/