Tursunov Mamatqul, and Tolliboyev Ilyos. “Method For Separating Lignin Water From Black Liquor”. American Journal of Science and Learning for Development 2, no. 11 (November 8, 2023): 9–12. Accessed May 20, 2024. https://inter-publishing.com/index.php/AJSLD/article/view/2823.