Differences in the efficiency between the grab and track starts for both genders in Greek young swimmers - Thanopoulos, V.; Rozi, G.; Okicic, T.; Dopsaj, M.; Jorgic, B.; Madic, D.; Velickovic, S.; Milanovic, Z.; Spanou, F.; Batis, E. (Journal of Human Kinetics, 2012)