VALGMA, Ingo; VÄIZENE, Vivika; KOLATS, Margit; KARU, Veiko; PASTARUS, Jüri Rivaldo; RAHE, Tiit; ISKÜL, Riho. Reduction of Oil Shale Losses. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 201–205, 2015. DOI: 10.17770/etr2013vol1.835. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/835.. Acesso em: 27 apr. 2025.