@article{MZM_1992_51_5_a16,
     author = {V. N. Temlyakov},
     title = {Estimates of best bilinear approximations of functions and approximation numbers of integral operators},
     journal = {Matemati\v{c}eskie zametki},
     pages = {125--134},
     publisher = {mathdoc},
     volume = {51},
     number = {5},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_5_a16/}
}