1. Vitiligo and psoralens;El Mofty,1968
2. The presently known distribution of furocoumarins (psoralens) in plants;Pathak,1962
3. Essentials of PUVA therapy;Lynch;Cutis,1977
4. Historical aspects of methoxsalen and other furocoumarins;Fitzpatrick;J Invest Dermatol,1959
5. The psoralens: an historical perspective;Benedetto;Cutis,1977