Joana M. Dias and  Conceição A. Ferraz and  Manuel F. Almeida,  Using Mixtures of Waste Frying Oil and Pork Lard to Produce Biodiesel.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 205 - 209
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/12898.