Filho, Walter Leal. “WATERSKETCH: TOWARDS SUSTAINABLE RIVER BASIN MANAGEMENT IN THE BALTIC SEA REGION”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 18, 2005): 310–318. Accessed November 27, 2024. https://journals.ru.lv/index.php/ETR/article/view/2123.