@article{TRSPY_1987_180_a130,
     author = {V. N. Temlyakov},
     title = {On estimates of the best bilinear approximations of periodic functions and singular numbers of integral operators},
     journal = {Informatics and Automation},
     pages = {213--214},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a130/}
}