Yamgoue, Serge Bruno, Olivier Tiokeng Lekeufack, and Timoleon Crepin Kofane. “Harmonic Balance for Non-Periodic Hyperbolic Solutions of Nonlinear Ordinary Differential Equations”. Mathematical Modelling and Analysis 22, no. 2 (March 18, 2017): 140-156. Accessed November 29, 2024. https://bme.vgtu.lt/index.php/MMA/article/view/881.