Sugiharto, R. and Hidayati, Sri and Cholik, R (2019) Application of response surface methodology to evaluate biodiesel production from spent bleaching earth by in situ transesterification process. In: International Conference on Green Agro-industry and Bioeconomy, 18-20 September 2018, UB Malang.

Sugiharto, R. and Hidayati, Sri and Cholik, R (2019) similarity: Application of response surface methodology to evaluate biodiesel production from spent bleaching earth by in situ transesterification process. IOP Conf. Series: Earth and Environmental Science, IOP Conf. Series: Earth and Environmental Science, 292 (1). pp. 1-10..