@article{GDZPPN002184303,
title = {Direct decompositions of partially ordered sets with zero.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {238},
year = {1969},
pages = {97-108},
zbl = {0188.04202},
url = {http://dml.mathdoc.fr/item/GDZPPN002184303}
}
Schmidt, J.; Novák, V. Direct decompositions of partially ordered sets with zero.. Journal für die reine und angewandte Mathematik, Tome 238 (1969) pp. 97-108. http://gdmltest.u-ga.fr/item/GDZPPN002184303/