KRONBERGS, Ē. BIOMASU ENERĢIJA LAUKU VIDĒ. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 74–79, 1999. DOI: 10.17770/etr1999vol1.1901. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/1901.. Acesso em: 23 nov. 2024.