@article{DAN_1977_232_4_a6,
     author = {V. I. Ivanov},
     title = {On one-sided approximations of functions in the $L_p$-metrics},
     journal = {Doklady Akademii Nauk},
     pages = {760--762},
     publisher = {mathdoc},
     volume = {232},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_232_4_a6/}
}