Sondore, Anita, Elfrīda Krastiņa, Pēteris Daugulis, and Elga Drelinga. “UNDERSTANDING OF BASIC CONCEPTS FOR MASTERING COMPETENCES OF SCHOOL MATHEMATICS”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 2 (May 26, 2016): 330–342. Accessed November 15, 2024. https://journals23.rta.lv/index.php/SIE/article/view/1383.