@article{VSGU_2012_9_a4,
     author = {O. S. Lyamina},
     title = {On norms and certain characteristics of trigonometric approximation by {Baskakov} operators},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {41--51},
     publisher = {mathdoc},
     number = {9},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2012_9_a4/}
}