Vaganova, Olga I., Marina N. Bulaeva, Liliya A. Meteleva, Alena A. Popkova, et Ekaterina V. Vezetiu. 2020. « Portfolio As an Educational Technology in the Educational Process of a University ». Amazonia Investiga 9 (25):356-61. https://amazoniainvestiga.info/index.php/amazonia/article/view/1080.