Kulkarni, H.G., N.N. Sirmokadam, A.K. Shenvi, and G.M. Hegde. 2010. “Spectroscopic Studies of Organosolv Lignin from Arecanut Husk ”. Asian Journal of Chemistry 7 (3):479-84. https://asianpubs.org/index.php/ajchem/article/view/24335.