SUSTAINABLE DEVELOPMENT - PROBLEMS OF MEASUREMENT AND POSSIBILITIES OF REALISATION . (CASE STUDY OF NORTH - EASTERN ESTONIA). ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 9–12, 1997. DOI: 10.17770/etr1997vol1.1863. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3400.. Acesso em: 11 mar. 2026.