Paokanta, Siriluk, and Charinthip Hengkrawit. “A General Solution of a Generalized Mixed Type of Polynomial Functional Equations”. Thai Journal of Science and Technology 2, no. 3 (November 14, 2013): 218–225. Accessed April 20, 2024. https://li01.tci-thaijo.org/index.php/tjst/article/view/14528.