Stoykov, Krasimir, Georgi Dimenchev, and Ivan Ivanov. “EFFECTS OF ECCENTRIC-ORIENTED TRAINING WITH INERTIAL RESISTANCE ON THE DEVELOPMENT OF SPORT-SPECIFIC PHYSICAL QUALITIES IN YOUTH TENNIS PLAYERS”. KNOWLEDGE - International Journal 74, no. 4 (February 13, 2026): 553–557. Accessed August 11, 2026. https://ojs.ikm.mk/index.php/kij/article/view/8132.