@article{IVM_1986_8_a6,
     author = {B. L. Laptev and A. Ya. Sultanov},
     title = {A problem of {I.} {P.~Egorov} in the theory of motions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {34--39},
     year = {1986},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1986_8_a6/}
}