@article{1183540402,
author = {Canfield, E. Rodney},
title = {On a problem of Rota},
journal = {Bull. Amer. Math. Soc.},
volume = {84},
number = {6},
year = {1978},
language = {en},
url = {http://dml.mathdoc.fr/item/1183540402}
}
Canfield, E. Rodney. On a problem of Rota. Bull. Amer. Math. Soc., Tome 84 (1978) no. 6, . http://gdmltest.u-ga.fr/item/1183540402/