@article{IVP_2017_25_6_a4,
     author = {V. V. Zaytcev},
     title = {The discrete van der {Pol} oscillator: {Finite} differences and slow amplitudes},
     journal = {Izvestiya VUZ. Applied Nonlinear Dynamics},
     pages = {70--78},
     publisher = {mathdoc},
     volume = {25},
     number = {6},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVP_2017_25_6_a4/}
}