@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/}
}