Muhammad Fahrizal Hidayat, Gatot Jariono. Contribution of Grip Strength and Back Muscle Flexibility to Slice Service Accuracy in Tennis Court UKM Muhammadiyah University of Surakarta. IJERSC [Internet]. 2021Aug.25 [cited 2025Nov.19];2(4):751-7. Available from: https://www.ijersc.org/index.php/go/article/view/141