HARITON, Andrei, and Laurenţiu CALMUŢCHI. “TEOREMA CELOR TREI PERPENDICULARE ŞI RECIPROCELE EI”. Acta et Commentationes, Sciences of Education 3, no. 2 (June 26, 2019): 118-125. Accessed May 12, 2025. https://revistaust.upsc.md/index.php/acta_educatie/article/view/114.