GHERŢOIU, D. M., and C. M. MOCA. “YOUTH TENNIS PLAYER SERVES ACCURACY WITH RESPECT TO DIFFERENT RACKETS VARIATIONS”. Studia Universitatis Babeș-Bolyai Educatio Artis Gymnasticae, vol. 65, no. 4, Dec. 2020, pp. 59-66, doi:10.24193/subbeag.65(4).31.