Hoosebeak MR, van Breeman N, Wallen B, Rydin H, Lee JA, Sivola J, Vasander H, Berendse F, Grosvernier P, Sutton (E)MA, et al. Terrestrial ecosystem research in Europe: successes, challenges and policy. In: Brussels.: Directorate-General for Research; 2001.

Press MC, Fergusson P, Lee JA. Two hundred years of acid rain. Naturalist. 1983  ;108:125-129.