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@article{DAN_1961_137_4_a9, author = {S. Ya. Havinson}, title = {Some problems concerning the completeness of systems}, journal = {Doklady Akademii Nauk}, pages = {793--796}, publisher = {mathdoc}, volume = {137}, number = {4}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_4_a9/} }
S. Ya. Havinson. Some problems concerning the completeness of systems. Doklady Akademii Nauk, Tome 137 (1961) no. 4, pp. 793-796. http://geodesic.mathdoc.fr/item/DAN_1961_137_4_a9/