Kahar, Abdul, et al. “EFFECT OF PH ON LIQUID-PHASE MASS TRANSFER AND DIFFUSIVITY COEFFICIENT AT LEACHATE TREATMENT OF MUNICIPAL WASTE LANDFILL IN ANAEROBIC BIOREACTOR”. Eksergi, vol. 15, no. 2, Nov. 2018, pp. 24-33, doi:10.31315/e.v15i2.2327.