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@article{IVM_1961_6_a15, author = {B. M. Shain}, title = {Representation of generalized heaps}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {142--154}, publisher = {mathdoc}, number = {6}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1961_6_a15/} }
B. M. Shain. Representation of generalized heaps. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1961), pp. 142-154. http://geodesic.mathdoc.fr/item/IVM_1961_6_a15/