et. al., Narayana S Ravada,. “Existence Of Ψ - Bounded Solutions for Lyapunov Systems”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 11 (May 10, 2021): 1998–2009. Accessed May 12, 2025. https://www.turcomat.org/index.php/turkbilmat/article/view/6175.