“Limit cycles of discontinuous piecewise linear systems separated by a non-regular line and formed by an arbitrary linear system and a linear system without equilibrium points”. (2026) Nonlinear Studies, 33(1), pp. 73–82. Available at: https://www.nonlinearstudies.com/index.php/nonlinear/article/view/3761 (Accessed: 28 February 2026).