@article{1183497869,
author = {White, H. S.},
title = {Construction of a groupless and headless triad system on 31 elements},
journal = {Bull. Amer. Math. Soc.},
volume = {40},
number = {12},
year = {1934},
pages = { 829-832},
language = {en},
url = {http://dml.mathdoc.fr/item/1183497869}
}
White, H. S. Construction of a groupless and headless triad system on 31 elements. Bull. Amer. Math. Soc., Tome 40 (1934) no. 12, pp. 829-832. http://gdmltest.u-ga.fr/item/1183497869/