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@article{MV_1970_22_3_a19, author = {S. Lajos}, title = {A characterezation of regular duo semigroups}, journal = {Matemati\v{c}ki vesnik}, pages = {401 }, publisher = {mathdoc}, volume = {22}, number = {3}, year = {1970}, url = {http://geodesic.mathdoc.fr/item/MV_1970_22_3_a19/} }
S. Lajos. A characterezation of regular duo semigroups. Matematički vesnik, Tome 22 (1970) no. 3, p. 401 . http://geodesic.mathdoc.fr/item/MV_1970_22_3_a19/