Permana, Yudi, Soegiyanto Soegiyanto, and Donny Kusuma. 2021. “A Development of Sensor Aids for Goalkeeping Violations Over the Goal Line on First Point Penalty Kicks on Futsal”. Journal of Physical Education and Sports 10 (4), 385-93. https://doi.org/10.15294/jpes.v10i4.51174.