Arpah, M. “Strategies For 2-Heptanone Biosynthesis From Octanoic Acid By Penicillium Roqueforti Spores”. Jurnal Teknologi Dan Industri Pangan, vol. 14, no. 2, May 2010, p. 169, https://journal.ipb.ac.id/jtip/article/view/694.