1. Computer calculation of solar ultraviolet radiation at ground level;Björn;Physiol. Veg.,1985
2. Effects of enhanced UV-B radiation on subarctic vegetation;Björn,1996
3. Net photosynthesis, electron transport capacity and ultrastructure of Pisum sativum L. exposed to ultraviolet-B radiation;Brandle;Plant Physiol.,1977
4. Solar ultraviolet radiation and the growth and development of higher plants;Caldwell,1971
5. Effects of increased solar ultraviolet radiation on terrestrial plants;Caldwell;Ambio,1995