@article{IVM_1976_1_a0,
     author = {L. I. Bausov and I. M. Petrov},
     title = {Approximation of a~class of functions of several variables by certain polynomial operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--9},
     publisher = {mathdoc},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1976_1_a0/}
}