Jinying Guo, Huailong Shi*, Ren Luo & Jing Zeng. Bifurcation analysis of a railway wheelset with nonlinear wheel-rail contact. Nonlinear Dynamics, 2021, 104: 989–1005.
https://doi.org/10.1007/s11071-021-06373-8
Fig. 6. Bifurcation map a case1 b case2 (open symbols stand for unstable limit circle, while solid ones for stable limit circle).
