Team, S. “Stability of the General Mixed Additive and Quadratic Functional Equation in Quasi Banach Spaces: Prondanai Kaskasem, Chakkrid Klin-Eam, Boriwat Noytabtim”. Thai Journal of Mathematics, vol. 18, no. 3, Sept. 2020, pp. 1299–1322, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1073.