Falah, Faizatul, Muhammad Adly Rahandi Lubis, Triastuti Triastuti, Widya Fatriasari, and Fahriya Puspita Sari. “Utilization of Lignin from the Waste of Bioethanol Production As a Mortar Additive”. Jurnal Sylva Lestari 8, no. 3 (September 28, 2020): 326–339. Accessed May 8, 2024. https://sylvalestari.fp.unila.ac.id/index.php/JHT/article/view/443.