Guo, S. and Luo, A.C.J. 2026. A Parameter Study on Periodic Motions in a Discontinuous Dynamical System with Two Circular Boundaries. Discontinuity, Nonlinearity, and Complexity. 10, 2 (Aug. 2026), 289–309. DOI:https://doi.org/10.5890/DNC.2021.06.009.