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@article{SF_1972__4_133890, author = {T. Tamura and H.B. Hamilton}, title = {Is minimal group congruence smallest?}, journal = {Semigroup forum}, pages = {173--176}, publisher = {mathdoc}, volume = {4}, year = {1972}, zbl = {0256.20080}, url = {http://geodesic.mathdoc.fr/item/SF_1972__4_133890/} }
T. Tamura; H.B. Hamilton. Is minimal group congruence smallest?. Semigroup forum, Tome 4 (1972), pp. 173-176. http://geodesic.mathdoc.fr/item/SF_1972__4_133890/