@article{1183526020,
author = {Tully, E. J.},
title = {The equivalence, for varieties of semigroups, of two properties concerning
congruence relations},
journal = {Bull. Amer. Math. Soc.},
volume = {70},
number = {6},
year = {1964},
pages = { 399-400},
language = {en},
url = {http://dml.mathdoc.fr/item/1183526020}
}
Tully, E. J. The equivalence, for varieties of semigroups, of two properties concerning
congruence relations. Bull. Amer. Math. Soc., Tome 70 (1964) no. 6, pp. 399-400. http://gdmltest.u-ga.fr/item/1183526020/