1. ^{{cite journal | vauthors = Croteau R, Venkatachalam KV | title = Metabolism of monoterpenes: demonstration that (+)-cis-isopulegone, not piperitenone, is the key intermediate in the conversion of (-)-isopiperitenone to (+)-pulegone in peppermint (Mentha piperita) | journal = Archives of Biochemistry and Biophysics | volume = 249 | issue = 2 | pages = 306–15 | date = September 1986 | pmid = 3755881 | doi = 10.1016/0003-9861(86)90007-x }}
2. ^{{cite journal | vauthors = Ringer KL, McConkey ME, Davis EM, Rushing GW, Croteau R | title = Monoterpene double-bond reductases of the (-)-menthol biosynthetic pathway: isolation and characterization of cDNAs encoding (-)-isopiperitenone reductase and (+)-pulegone reductase of peppermint | journal = Archives of Biochemistry and Biophysics | volume = 418 | issue = 1 | pages = 80–92 | date = October 2003 | pmid = 13679086 | doi = 10.1016/s0003-9861(03)00390-4 }}