@article{ND_2021_17_4_a6,
     author = {B. S. Bardin and E. A. Chekina},
     title = {On the {Orbital} {Stability} of {Pendulum-like} {Oscillations
}},
     journal = {Russian journal of nonlinear dynamics},
     pages = {453--464},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ND_2021_17_4_a6/}
}