Skudra, Sanita, Galia Shulga, Vadims Shakels, Lubova Belkova, and Skaidrite Reihmane. “Properties of Isolated Lignin From Model Wastewater”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 5, 2015): 282–287. Accessed November 23, 2024. https://journals.ru.lv/index.php/ETR/article/view/921.