@article{VMUMM_1998_4_a1,
     author = {T. P. Lukashenko},
     title = {Generalized expansion systems similar to orthogonal ones},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {6--10},
     publisher = {mathdoc},
     number = {4},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1998_4_a1/}
}