[3] Berbache, A.:
Two explicit non-algebraic crossing limit cycles for a family of piecewise linear systems. Mem. Differ. Equ. Math. Phys. 83 (2021), 13-29.
MR 4281028 |
Zbl 1473.34033
[16] Llibre, J., Ponce, E.:
Three nested limit cycles in discontinuous piecewise linear differential systems with two zones. Dyn. Contin. Discrete Impuls. Syst., Ser. B, Appl. Algorithms 19 (2012), 325-335.
MR 2963277 |
Zbl 1268.34061
[17] Lum, R., Chua, L. O.:
Global properties of continuous piecewise linear vector fields. I: Simplest case in $R^2$. Int. J. Circuit Theory Appl. 19 (1991), 251-307.
DOI 10.1002/cta.4490190305 |
Zbl 0732.34029
[18] Lum, R., Chua, L. O.:
Global properties of continuous piecewise linear vector fields. II: Simplest symmetric case in $R^2$. Int. J. Circuit Theory Appl. 20 (1992), 9-46.
DOI 10.1002/cta.4490200103 |
Zbl 0732.34029