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@article{MZM_1994_56_5_a7, author = {Yu. A. Nikolaevskii}, title = {On {Fenchel's} problem}, journal = {Matemati\v{c}eskie zametki}, pages = {87--97}, publisher = {mathdoc}, volume = {56}, number = {5}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1994_56_5_a7/} }
Yu. A. Nikolaevskii. On Fenchel's problem. Matematičeskie zametki, Tome 56 (1994) no. 5, pp. 87-97. http://geodesic.mathdoc.fr/item/MZM_1994_56_5_a7/