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@article{TM_1997_213_a8, author = {S. I. Trifonov}, title = {Cyclicity of elementary polycycles of generic smooth vector fields}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {152--212}, publisher = {mathdoc}, volume = {213}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1997_213_a8/} }
S. I. Trifonov. Cyclicity of elementary polycycles of generic smooth vector fields. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Differential equations with real and complex time, Tome 213 (1997), pp. 152-212. http://geodesic.mathdoc.fr/item/TM_1997_213_a8/