@article {306, title = {A new potential air-quality criterion derived from vertical flux densitites of ozone and from plant response}, journal = {Angewandte Botanik}, volume = {67}, year = {1993}, pages = {9-13}, author = {Grunhage, L. and Dammgen, U. and Haenel, H.D. and Jager, H.J. and Holl, A. and Schmitt, J. and Hanewald, K.} }