@article{TMF_2003_134_2_a4,
     author = {P. E. Ryabov},
     title = {Bifurcations of {First} {Integrals} in the {Sokolov} {Case}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {207--226},
     publisher = {mathdoc},
     volume = {134},
     number = {2},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2003_134_2_a4/}
}