Phungern, A. ., and T. . Yimlamai. “EFFECTS OF PLYOMETRIC AND ECCENTRIC TRAINING ON ACHILLES TENDON STIFFNESS IN MALE LONG-DISTANCE RUNNERS”. Journal of Sports Science and Health, vol. 22, no. 2, Aug. 2021, pp. 217-29, https://he02.tci-thaijo.org/index.php/spsc_journal/article/view/253208.