@article{104646,
author = {V\'aclav Havel},
title = {Partitions in ternars},
journal = {Archivum Mathematicum},
volume = {003},
year = {1967},
pages = {209-213},
zbl = {0215.40402},
mrnumber = {0238751},
language = {en},
url = {http://dml.mathdoc.fr/item/104646}
}
Havel, Václav. Partitions in ternars. Archivum Mathematicum, Tome 003 (1967) pp. 209-213. http://gdmltest.u-ga.fr/item/104646/
Über Ketten von Faktoroiden, Math. Ann. 118 (1941), 41--64. (1941) | MR 0005745
Théorie des décompositions dans un ensemble, Publications de la Faculté des sciences de l'université (Brno) No. 278/1946, 1-37 (in Czech, with french summary). (1946) | MR 0019692