@ARTICLE {9128,
author={P. Mendes and M. Couceiro Couceiro and R. Rocha and F.M.C. Clemente and F. Martins and R. Mendes and J. P.  Fuentes},
doi={10.1260/1747-9541.10.1.97},
journal={International Journal of Sports Science and Coaching},
title={Effects of an Extrinsic Constraint on the Tennis Serve},
year={2015},
month={April},
volume={10},
number={1},
pages={97-110},
ISSN={1747-9541}
}