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@article{IVM_1970_11_a6, author = {L. G. Labsker and L. A. Markova}, title = {A~constructive definition of the functionals of class $S_m$}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {59--70}, publisher = {mathdoc}, number = {11}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_11_a6/} }
L. G. Labsker; L. A. Markova. A~constructive definition of the functionals of class $S_m$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1970), pp. 59-70. http://geodesic.mathdoc.fr/item/IVM_1970_11_a6/