Sustainable Development Perspectives for Latvian Regions. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 2, p. 13–19, 2015. DOI: 10.17770/etr2015vol2.265. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3983.. Acesso em: 11 mar. 2026.