Idowu, B. A. A., U. E. E. Vincent, and A. N. N. Njah. “Generalized Adaptive Backstepping Synchronization for Non-Identical Parametrically Excited Systems”. Nonlinear Analysis: Modelling and Control 14, no. 2 (April 25, 2009): 165–176. Accessed May 18, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/14519.