@article{RM_1977_32_6_a7,
     author = {V. V. Bykov},
     title = {The generation of periodic motions from the separatrix contour of a three-dimensional system},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {32},
     number = {6},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1977_32_6_a7/}
}