Jahan, M Sarwar, and Sung Phil Mun. “Isolation and Characterization of Lignin from Tropical and Temperate Hardwood”. Bangladesh Journal of Scientific and Industrial Research 44, no. 3 (February 15, 2010): 271–280. Accessed February 28, 2026. https://www.banglajol.info/index.php/BJSIR/article/view/4399.