@article{DE_1996_32_1_a0,
     author = {N. A. Bobylev and A. V. Bulatov and S. K. Korovin and A. A. Kutuzov},
     title = {On a scheme for studying cycles of nonlinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {3--8},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_1_a0/}
}