THE EFFECT OF SPECIAL EXERCISES USING GUIDE SIGNS AND LIGHT LASERS IN DEVELOPING CONCENTRATION AND PERCEPTION AND LEARNING SOME ARTISTIC GYMNASTICS SKILLS FOR STUDENTS. ResearchJet Journal of Analysis and Inventions, [S. l.], v. 4, n. 02, p. 144–160, 2023. DOI: 10.17605/OSF.IO/BNEJS. Disponível em: https://reserchjet.academiascience.org/index.php/rjai/article/view/677. Acesso em: 31 jan. 2026.