@article{ND_2011_7_3_a2,
     author = {R. E. Kondrashov and A. D. Morozov},
     title = {On global behaviour of the solutions of system of two {Duffing} -- {Van} der {Pole} equations},
     journal = {Russian journal of nonlinear dynamics},
     pages = {437--449},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2011_7_3_a2/}
}