Kaczorek, Tadeusz. “Pointwise Completeness and Pointwise Degeneracy of Standard and Postitive Linear Systems With State-Feedbacks”. Journal of Automation, Mobile Robotics and Intelligent Systems 4, no. 1 (January 22, 2010): 3–7. Accessed April 30, 2025. https://www.jamris.org/index.php/JAMRIS/article/view/99.