SHARIFJANOVNA, Q. M. Perpendicularity of a Straight Line to a Plane and a Plane to a Plane. International Journal of Innovative Analyses and Emerging Technology, [S. l.], v. 1, n. 5, p. 70–71, 2021. Disponível em: https://openaccessjournals.eu/index.php/ijiaet/article/view/378. Acesso em: 20 may. 2024.