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@article{IVM_1973_11_a6, author = {L. G. Mustafaev and Yu. A. Sharkov}, title = {Semi-isomorphisms of semiheaps}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {60--65}, publisher = {mathdoc}, number = {11}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1973_11_a6/} }
L. G. Mustafaev; Yu. A. Sharkov. Semi-isomorphisms of semiheaps. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1973), pp. 60-65. http://geodesic.mathdoc.fr/item/IVM_1973_11_a6/