@article{TRSPY_2018_300_a12,
     author = {A. G. Petrov and V. V. Vanovskiy},
     title = {Nonlinear oscillations of a~spring pendulum at the 1 : 1 : 2 resonance: theory, experiment, and physical analogies},
     journal = {Informatics and Automation},
     pages = {168--175},
     year = {2018},
     volume = {300},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2018_300_a12/}
}