@article{IVM_1967_4_a9,
     author = {L. S. Rakovshchik},
     title = {On a~class of integral operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--80},
     publisher = {mathdoc},
     number = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1967_4_a9/}
}