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@article{DAN_1969_188_6_a10, author = {E. M. Levich}, title = {On a problem of {P.~Hall}}, journal = {Doklady Akademii Nauk}, pages = {1241--1243}, publisher = {mathdoc}, volume = {188}, number = {6}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_6_a10/} }
E. M. Levich. On a problem of P.~Hall. Doklady Akademii Nauk, Tome 188 (1969) no. 6, pp. 1241-1243. http://geodesic.mathdoc.fr/item/DAN_1969_188_6_a10/