Team S. Hyers-Ulam Stability of Linear Differential Equations y′′ = λ2y: Yongjin Li. Thai J Math [Internet]. 2010 Aug. 1 [cited 2024 Dec. 22];8(2):215-9. Available from: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/193