@article{ZVMMF_2009_49_7_a4,
     author = {I. Yu. Vygodchikova and S. I. Dudov and E. V. Sorina},
     title = {External estimation of a~segment function by a~polynomial strip},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1175--1183},
     year = {2009},
     volume = {49},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_7_a4/}
}