Barbosa, S. L.; Miranda, S. E. O.; Barbosa, B. K.; Ottone, M.; klein, S. I.; Baroni, A. C. M.; Hurtado, G. R. Biodiesel from Waste Cooking Oil: Sodium Carbonate Modified Sand As Filter, TLC and the Unmodified Domestic Microwave Oven Approach. Eclet. Quim. 2016, 39, 120-130.