@article{MZM_1992_51_5_a6,
     author = {S. F. Kamornikov},
     title = {A problem of {Kegel}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {51--56},
     publisher = {mathdoc},
     volume = {51},
     number = {5},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_5_a6/}
}