@article{ZVMMF_1985_25_11_a2,
     author = {L. A. Onegov},
     title = {An extremal problem of approximation of integrals with fixed singularity in the class $W^rL_2$},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1599--1613},
     publisher = {mathdoc},
     volume = {25},
     number = {11},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1985_25_11_a2/}
}