Walse, C., Schoepp, W. ORCID: https://orcid.org/0000-0001-5990-423X & Warfvinge, P. (1998). Response of six European forest sites to decided and proposed air pollution emission reductions. Environmental Pollution 98 (2), 253-267. 10.1016/S0269-7491(97)00122-X.