08. Blumthaler M, Ambach W, Ellinger, R: Increase in solar UV radiation with altitude. Journal of Photochemistry and Photobiology B: Biology 1997;39:130-134.

08. Blumthaler M, Ambach W, Ellinger, R: Increase in solar UV radiation with altitude. Journal of Photochemistry and Photobiology B: Biology 1997;39:130-134.