Geodesic
On the theory of complete multiplicative periodic orthonormal systems
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 24 (1969) no. 6 
A. M. Zubakin. On the theory of complete multiplicative periodic orthonormal systems. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 24 (1969) no. 6. http://geodesic.mathdoc.fr/item/RM_1969_24_6_a2/
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     author = {A. M. Zubakin},
     title = {On the theory of complete multiplicative periodic orthonormal systems},
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     year = {1969},
     volume = {24},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1969_24_6_a2/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

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[2] N. Ya. Vilenkin, “Ob odnom klasse polnykh ortonormalnykh sistem”, Izv. AN, 11 (1947), 363–400 | MR

[3] N. Ya. Vilenkin, G. N. Agaev, G. M. Dzhafarli, “K teorii multiplikativnykh ortonormirovannykh sistem funktsii”, DAN Az. SSR, 18:9 (1962), 3–7 | MR | Zbl

[4] A. M. Zubakin, “Sib. matem. zh.”, 9, 1 (1968), 206–210 | MR

[5] A. V. Efimov, “O nekotorykh approksimativnykh svoistvakh periodicheskikh multiplikativnykh ortonormirovannykh sistem”, Matem. sb., 69 (111):3 (1966), 354–370 | MR | Zbl

[6] S. Kachmazh, G. Shteingauz, Teoriya ortogonalnykh ryadov, Fizmatgiz, M., 1958 | MR