@article{TIMM_1998_5_a16,
     author = {A. I. Vasil'ev},
     title = {On {Bernstein's} theorem about a~sequence of best approximations in spaces $L^{\varphi}$.},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {227--246},
     publisher = {mathdoc},
     volume = {5},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_1998_5_a16/}
}