Jahan, M Sarwar, D Alam, M Mostafzur Rahman, and MA Quaiyyum. 2015. “Isolation and Characterization of Lignin from Okra (Abelmoschus Esculentus) Fibre and Stick”. Bangladesh Journal of Scientific and Industrial Research 50 (4):257-62. https://doi.org/10.3329/bjsir.v50i4.25834.