Digital Dynamometer and Goniometer in Analyzing Isometric Capacities and Tennis ServingChia-Che Liu, Chih-Chien Yang, Liang-Ting Tsai, Bi-Fon Chang, Hsiao-Yun Chang and Chi-Fan LiuMATEC Web Conf., 71 (2016) 05003DOI: https://doi.org/10.1051/matecconf/20167105003