Kiagus Ahmad Roni. 2022. “Glycerol Conversion from Biodiesel of Cooking Oil With Recydu Catalytic Cracking Catalyst At Pertamina”. iJournals:International Journal of Software & Hardware Research in Engineering ISSN:2347-4890 10 (5). https://doi.org/10.26821/IJSHRE.10.5.2022.100502.