For citations:

Lichkovakha A.S., Donchenko A.V. Angular Oscillations of Nonlinear Systems in Spring Suspension of Rolling Stock. Trudy Rostovskogo gosudarstvennogo universiteta putey soobseniya. 2025;(1):113-116. (In Russ.) https://doi.org/10.46973/1818-5509_2025_2_113