ATANASOV, Risto. ONLINE HOMEWORK SYSTEMS IN CALCULUS. Matematichki Bilten, [S. l.], v. 40, n. 2, 2016. DOI: 10.37560/matbil16200065a. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1825. Acesso em: 13 jun. 2026.