1. Photoprotection;Kullavanijaya;J Am Acad Dermatol,2005
2. Photoreactivity of Heracleum laciniatum;Kavli;University of Tromsø,1982
3. Fototoksiske plantedermatiter hos børn;Carlsen;(phytophotodermatitis) Månedsskrift for Praktisk Lægegerning,1990
4. Heracleum mantegazzianum (giant hogweed or cartwheel flower). In: Hanks P, editor. Collins English dictionary. 2nd ed. London: 2004. p. 174.
5. Phototoxicity of Dictamnus alba;Møller;Contact Dermatitis,1978