Technical actions, heart rate, and locomotor activity in 7v7 and 8v8 games for female youth soccer players - Oerntoft, C.; Larsen, M. N.; Andersen, T. B.; Rasmussen, L. S.; Póvoas, S. C. A.; Randers, M. B.; Krustrup, P. (The Journal of Strength and Conditioning Research, 2016)