@article{ZVMMF_1992_32_10_a1,
     author = {D. O. Filimonenkov},
     title = {Error estimates for certain piecewise-polynomial approximations in a plane},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1545--1553},
     publisher = {mathdoc},
     volume = {32},
     number = {10},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1992_32_10_a1/}
}