Sakamaki N.; Nakazato M.; Matsumoto H.; Hagino K.; Hirata K.; Ushiyama H. (2008). "Contents of furanocoumarins in grapefruit juice and health foods". Journal of the Food Hygienic Society of Japan. 49 (4): 326–331. doi:10.3358/shokueishi.49.326. PMID18787320.
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Sakamaki N.; Nakazato M.; Matsumoto H.; Hagino K.; Hirata K.; Ushiyama H. (2008). "Contents of furanocoumarins in grapefruit juice and health foods". Journal of the Food Hygienic Society of Japan. 49 (4): 326–331. doi:10.3358/shokueishi.49.326. PMID18787320.