Production and Foreign Trade of Mineral Products in Latvia and Belarus. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 240–245, 2015. DOI: 10.17770/etr2013vol1.830. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3840.. Acesso em: 11 mar. 2026.