LÊ THIẾU, T. EXTENDING SOME RESULTS OF FLAT GEOMETRY WHEN SOLVING SPATIAL GEOMETRY. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, [S. l.], v. 7, n. 21, 2021. DOI: 10.51453/2354-1431/2021/510. Disponível em: https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/510. Acesso em: 23 nov. 2024.