Patanavijit V. Mathematical Tutorial of Discrete-Time Analysis of Sampling Rate Changing Concept for Digital Signal Processing and Digital Communication Prospective. Prog Appl Sci Tech. [internet]. 2016 Nov. 1 [cited 2026 Sep. 24];6(2):58-72. available from: https://ph02.tci-thaijo.org/index.php/past/article/view/243141