@article{TM_1972_128_a16,
     author = {V. Ya. Yanchak},
     title = {The expansion of functions of a mixed class in a series of algebraic polynomials},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {242--256},
     publisher = {mathdoc},
     volume = {128},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1972_128_a16/}
}