@article{ZVMMF_1968_8_5_a2,
     author = {M. A. Aleksidze},
     title = {Series in nonorthogonal function systems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {965--987},
     year = {1968},
     volume = {8},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_5_a2/}
}