A. B. . Pratama and V. S. . Sistiasih, “THE RELATIONSHIP BETWEEN ABDOMINAL MUSCLE STRENGTH AND LIMB MUSCLE EXPLOSIVENESS TO THE SMASH ABILITY OF VOLLEYBALL UNIT MEMBERS MUHAMMADIYAH UNIVERSITY OF SURAKARTA”, ECO EDU ENTRE, vol. 1, no. 2, pp. 94–103, Aug. 2021.