@article{FPM_1997_3_2_a9,
     author = {T. P. Lukashenko},
     title = {Systems of expansions similar to orthogonal systems},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {487--517},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1997_3_2_a9/}
}