PURMALIS, Oskars; KĻAVIŅŠ, Linards; ARBIDANS, Lauris. COMPOSITION AND QUALITY OF FRESHWATER LAKE SEDIMENTS (BALVU AND PĒRKONU LAKES). ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 229–235, 2019. DOI: 10.17770/etr2019vol1.4129. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/4129.. Acesso em: 19 dec. 2024.