ECOLOGICAL EXPEDITION AS EFFECTIVE FORM OF ENVIRONMENTAL RESEARCH AND ECOLOGICAL EDUCATION. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 254–261, 2007. DOI: 10.17770/etr2007vol1.1730. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3636.. Acesso em: 11 mar. 2026.