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@article{MV_1974_26_1_a16, author = {S. Lajos}, title = {On semigroups that are semilattices of left groups}, journal = {Matemati\v{c}ki vesnik}, pages = {125 }, publisher = {mathdoc}, volume = {26}, number = {1}, year = {1974}, url = {http://geodesic.mathdoc.fr/item/MV_1974_26_1_a16/} }
S. Lajos. On semigroups that are semilattices of left groups. Matematički vesnik, Tome 26 (1974) no. 1, p. 125 . http://geodesic.mathdoc.fr/item/MV_1974_26_1_a16/