M. Wylde, L. C. Yong, A. R. Aziz, S. Mukherjee, and M. Chia, “Application of Gps Technology to Create Activity Profiles of Youth International Field Hockey Players in Competitive Match-Play”, Int. J. Phys. Educ. Fit. Sports, vol. 3, no. 2, pp. 74–78, Jun. 2014.