Klavina, Aneka, Agris Auce, Ivars Vanadzins, Alise Silova, and Linda Dobkevica. “EXTRACTION OF BIOLOGICALLY ACTIVE COMPONENTS FROM FRESHWATER SAPROPEL”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 20, 2019): 114–118. Accessed November 21, 2024. https://journals23.rta.lv/index.php/ETR/article/view/4135.