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@article{SJIM_1999_2_2_a3, author = {H. Ya. Bulgakov and V. L. Vaskevich}, title = {Hierarchical bases in {Hilbert} spaces}, journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki}, pages = {24--35}, publisher = {mathdoc}, volume = {2}, number = {2}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/SJIM_1999_2_2_a3/} }
H. Ya. Bulgakov; V. L. Vaskevich. Hierarchical bases in Hilbert spaces. Sibirskij žurnal industrialʹnoj matematiki, Tome 2 (1999) no. 2, pp. 24-35. http://geodesic.mathdoc.fr/item/SJIM_1999_2_2_a3/