Stoykov, Krasimir, Georgi Dimenchev, and Ivan Ivanov. 2026. “EFFECTS OF ECCENTRIC-ORIENTED TRAINING WITH INERTIAL RESISTANCE ON THE DEVELOPMENT OF SPORT-SPECIFIC PHYSICAL QUALITIES IN YOUTH TENNIS PLAYERS”. KNOWLEDGE - International Journal 74 (4):553-57. https://ojs.ikm.mk/index.php/kij/article/view/8132.