Khanithar Naenudorn และ Charinthip Hengkrawit. (2013) A Remark on a Functional Equation Related to Digital Filtering. <i>Thai Journal of Science and Technology</i>, <i>2</i>(3), 226-230.Khanithar Naenudorn และ Charinthip Hengkrawit. "A Remark on a Functional Equation Related to Digital Filtering". Thai Journal of Science and Technology 2 (2013):226-230.Khanithar Naenudorn และ Charinthip Hengkrawit. A Remark on a Functional Equation Related to Digital Filtering. Thammasat University:ม.ป.ท. 2013.