Zhumatov, S. S. “Exponential Stability of a Program Manifold of Indirect Control Systems”. Ukrains’kyi Matematychnyi Zhurnal 62, no. 6 (June 25, 2010): 784–790. Accessed May 5, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2909.