Fadhil, Z. ., D. S. . Zageer, A. H. . Faris, and M. H. . Al-Mashhadani. “An Overview: Importance of Lignin and Different Analytical Approaches to De-Lignify It from Plants”. GSC Advanced Research and Reviews, vol. 8, no. 3, Sept. 2021, pp. 119-2, doi:10.30574/gscarr.2021.8.3.0182.