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@article{MZM_1967_1_5_a2, author = {K. A. Zaretskii}, title = {An abstract characterization of the bisemigroup of binary operations}, journal = {Matemati\v{c}eskie zametki}, pages = {525--530}, publisher = {mathdoc}, volume = {1}, number = {5}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1967_1_5_a2/} }
K. A. Zaretskii. An abstract characterization of the bisemigroup of binary operations. Matematičeskie zametki, Tome 1 (1967) no. 5, pp. 525-530. http://geodesic.mathdoc.fr/item/MZM_1967_1_5_a2/