@article{ND_2011_7_3_a19,
     author = {A. V. Tsiganov},
     title = {Comments on {P.\,E.~Ryabov} {``Explicit} integration and topology of {D.\,N.~Goryachev} case''},
     journal = {Russian journal of nonlinear dynamics},
     pages = {715--717},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2011_7_3_a19/}
}