@article{GDZPPN001247107, title = {On determinacies of monoids.}, journal = {Semigroup forum}, volume = {1}, year = {1970}, pages = {169-171}, zbl = {0232.20136}, url = {http://dml.mathdoc.fr/item/GDZPPN001247107} }
Hedrlin, Z.; Goralcik, P.; Münzova, M. On determinacies of monoids.. Semigroup forum, Tome 1 (1970) pp. 169-171. http://gdmltest.u-ga.fr/item/GDZPPN001247107/