Viorel Petru, Ardelean, Pierre Joseph de Hillerrin, and Radu Bidiugan. 2014. “STUDY ON THE POSSIBILITY OF HIGHLIGHTING INVARIANTS OF MOTION IN MARTIALARTS KATA EXERCISES”. Arena-Journal of Physical Activities, no. 3 (December):87-96. https://www.uav.ro/jour/index.php/ajpa/article/view/428.