Muhammed DD. An analytical study comparing the work done and the instantaneous speed of the ball to launch the penalty skill from the penalty mark (6 meters and 10 meters) for FUTSAL players. ms [Internet]. 2020 Nov. 3 [cited 2024 Apr. 29];19(3):0032. Available from: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/567