@article{VNGU_2011_11_1_a0,
     author = {E. P. Volokitin},
     title = {About the {Nondegeneration} {Conditions} in {Andronov--Hopf} {Bifurcation}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {3--14},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2011_11_1_a0/}
}