@article{MZM_1994_56_5_a7,
     author = {Yu. A. Nikolaevskii},
     title = {On {Fenchel's} problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {87--97},
     year = {1994},
     volume = {56},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_56_5_a7/}
}