Team, S. (2010) “Hyers-Ulam Stability of Linear Differential Equations y′′ = λ2y: Yongjin Li”, Thai Journal of Mathematics, 8(2), pp. 215–219. Available at: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/193 (Accessed: 22 December 2024).