“Isolation and Characterization of Lignin Obtained from Calliandra Calothyrsus Shrub Using FT-IR Spectroscopy”. International Journal of Current Engineering and Technology 4, no. 2 (April 30, 2014): 542–544. Accessed April 13, 2026. https://ijcet.evegenis.org/index.php/ijcet/article/view/569.