@article{DAN_1969_186_4_a2,
     author = {M. K. Gavurin and V. G. Afonin},
     title = {The numerical integration of certain systems of nonlinear vibration theory},
     journal = {Doklady Akademii Nauk},
     pages = {750--752},
     publisher = {mathdoc},
     volume = {186},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_186_4_a2/}
}