Polián, Pavel, Igor Kopotun, y Petr Polián. «Development of Virtual Learning Systems Based on Artificial Intelligence: International Experience». Amazonia Investiga 13, no. 73 (enero 30, 2024): 9–13. Accedido diciembre 4, 2025. https://www.amazoniainvestiga.info/index.php/amazonia/article/view/2640.