Yevgenievna Ryazanova, N., N. Evgenievna Lobzhanidze, E. Vladimirovna Kazakova, A. Michaelovna Avdonina, y A. Igorevich Nikiforov. «A Project Approach to Fostering students’ Competencies in the Professional Field "Ecology and Environmental management"». Opción, Vol. 35, agosto de 2019, pp. 35-49, https://www.produccioncientificaluz.org/index.php/opcion/article/view/27583.