@article{GDZPPN001250973,
title = {Minimal GROUP CONGRUENCES.},
journal = {Semigroup forum},
volume = {11},
year = {1975},
pages = {178-180},
url = {http://dml.mathdoc.fr/item/GDZPPN001250973}
}
Woa, Wen-Jin. Minimal GROUP CONGRUENCES.. Semigroup forum, Tome 11 (1975) pp. 178-180. http://gdmltest.u-ga.fr/item/GDZPPN001250973/