IQBOLJON, A. Problems of Depicting Spatial Figures on a Plane. European Journal of Life Safety and Stability (2660-9630), [S. l.], v. 12, p. 30-32, 2021. Disponível em: http://www.ejlss.indexedresearch.org/index.php/ejlss/article/view/254. Acesso em: 5 oct. 2025.