1. Baumert A, Gröger JD, Schmidt J, Kuzovrina IN, Mügge C (1988) Alkaloids and other constituents from tissue cultures of Ruta graveolens. Fitoterapia 59(2): 83–88
2. Beier R, Oertli EH (1983) Psoralen and other linear furocoumarins in celery. Phytochemistry: 22(11): 2595–2597
3. Bickoff EM, Booth AN, Lyman RL, Livingston AL, Thompson CR, de Eds F (1957) Coumestrol, a new oestrogen isolated from forage crops. Science 126: 969–970
4. Bardley M, Stirton CH, Harborne JB (1986) A chemotaxonomic survey of the tribe Psoraleae in Africa. Biochem Syst Ecol 14(6): 603–613
5. Bourgaud F, Allard N, Guckert A, Forlot P (1989) Natural source of furocoumarins (psoralens). In: Fitzpatrick TB, Forlot P, Pathak MA, Urbach F(eds) Past, present and future of photochemoprotection and other biological activities. Libbey J Eurotext, Montrouge, pp 219–229