Patete, Anna, and Katsuhisa Furuta. “Stability of Implicit Self-Tuning Controllers for Time-Varying Systems Based on Lyapunov Function.”. Rev. Téc. Fac. Ing. Univ. Zulia 34, no. 2 (1). Accessed November 13, 2025. http://www.produccioncientifica.luz.edu.ve/index.php/tecnica/article/view/7180.