RANDLA, Tiina; VILU, Raivo. THE PROBLEMS ON ESTIMATION OF THE RATE OF SUSTAINABILITY. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 151–152, 1999. DOI: 10.17770/etr1999vol1.1882. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/1882.. Acesso em: 1 may. 2024.