^Calvarano I., Calvarano M., Gionfriddo F., Bovalo F., Postorino E. HPLC profile of citrus essential oils from different species and geographic origin. Essenze Derivati agrumari. 1995, 65: 488–502.
^Sakamaki N., Nakazato M., Matsumoto H., Hagino K., Hirata K., Ushiyama H. Contents of furanocoumarins in grapefruit juice and health foods. Journal of the Food Hygienic Society of Japan. 2008, 49 (4): 326–331. PMID 18787320. doi:10.3358/shokueishi.49.326.
^Francesco Gionfriddo, Enrico Postorino and Giuseppe Calabrò. Elimination of Furocoumarins in Bergamot Peel Oil. Perfumer & Flavorist. 2004, 29.
^HONIGSMANN, HERBERT; JASCHKE, ERNA; GSCHNAIT, FRITZ; BRENNER, WILHELM; FRITSCH, PETER; WOLFF, KLAUS. 5-Methoxypsoralen (Bergapten) in photochemotherapy of psoriasis. British Journal of Dermatology (Wiley-Blackwell). 1979, 101 (4): 369–378. ISSN 0007-0963. doi:10.1111/j.1365-2133.1979.tb00014.x.