Maltseva, Anna, Elena Klyushnikova, Igor Veselov, Aleksandra Gridchina, Tatyana Chernova, and Gregory Soroko. 2019. “Modern Approaches to the Assessment of Massive Open Online Courses and Its Implementation on the Example of Courses for the Russian Language Studying”. Amazonia Investiga 8 (23):222-36. https://www.amazoniainvestiga.info/index.php/amazonia/article/view/603.