Jahan, M. S., Alam, D., Rahman, M. M., & Quaiyyum, M. (2015). Isolation and characterization of lignin from okra (Abelmoschus esculentus) fibre and stick. Bangladesh Journal of Scientific and Industrial Research, 50(4), 257–262. https://doi.org/10.3329/bjsir.v50i4.25834