@article{IVM_1968_4_a7,
     author = {G. S. Kocharyan},
     title = {Approximation in the mean on closed curves},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {48--53},
     year = {1968},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_4_a7/}
}