http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1056021/ (Publisher version)
Gershenzon, J., Maffei, M., & Croteau, R. (1989). Biochemical and histochemical localization of monoterpene biosynthesis in the glandular trichomes of spearmint (Mentha spicata). Plant Physiology, 89(4), 1351-1357. doi:10.1104/pp.89.4.1351.