@article{IVM_1968_10_a0,
     author = {V. I. Belyi and Yu. I. Volkov},
     title = {Some applications of integro-differential operators of arbitrary order in the theory of approximation of functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--12},
     publisher = {mathdoc},
     number = {10},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_10_a0/}
}