%0 Journal Article %A B. S. Bardin %A E. A. Chekina %T On the Orbital Stability of Pendulum-like Oscillations %J Russian journal of nonlinear dynamics %D 2021 %P 453-464 %V 17 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ND_2021_17_4_a6/ %G en %F ND_2021_17_4_a6