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@article{IVM_1963_4_a8, author = {M. E. Kva\v{c}ko}, title = {On the extension of a~set function}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {61--66}, publisher = {mathdoc}, number = {4}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1963_4_a8/} }
M. E. Kvačko. On the extension of a~set function. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1963), pp. 61-66. http://geodesic.mathdoc.fr/item/IVM_1963_4_a8/