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@article{IVM_1966_5_a16, author = {O. V. Shimel'fenig}, title = {Extension of generalized heaps}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {129--141}, publisher = {mathdoc}, number = {5}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1966_5_a16/} }
O. V. Shimel'fenig. Extension of generalized heaps. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1966), pp. 129-141. http://geodesic.mathdoc.fr/item/IVM_1966_5_a16/