A. N. VALIEV. ABOUT THE FEATURES OF THE PERSPECTIVE OF SIMPLE GEOMETRIC SHAPES AND PROBLEMS IN ITS TRAINING. International Engineering Journal For Research & Development, [S. l.], v. 6, n. 2, p. 7, 2021. DOI: 10.17605/OSF.IO/5MT2R. Disponível em: https://iejrd.com/index.php/iejrd/article/view/1714. Acesso em: 17 apr. 2026.