@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/