Zahrim, A. Y., Nazimah, A., & Rosalam, S. (2014). Lignin Removal From Aqueous Solution Using Calcium Lactate: The Effect Of Polymers And Magnesium Hydroxide As A Flocculant Aids, 14(1), 25-36. Diambil dari https://jurnal.ugm.ac.id/v3/AJChE/article/view/8476