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@article{IVM_1991_3_a14, author = {V. D. Derech}, title = {Quasi-orders on some inverse semigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {76--78}, publisher = {mathdoc}, number = {3}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1991_3_a14/} }
V. D. Derech. Quasi-orders on some inverse semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1991), pp. 76-78. http://geodesic.mathdoc.fr/item/IVM_1991_3_a14/