@article{DAN_1970_191_3_a7,
     author = {B. N. Petrov and R. A. Nelepin and B. M. Shamrikov},
     title = {Construction of separatrix surfaces and stability regions in the phase spaces of nonlinear systems},
     journal = {Doklady Akademii Nauk},
     pages = {530--532},
     publisher = {mathdoc},
     volume = {191},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_3_a7/}
}