N. Yevgenievna Ryazanova, 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, pp. 35-49, ago. 2019.