PERCY, Kevin E. State of science and knowledge gaps with respect to air pollution impacts on forests: Reports from concurrent IUFRO 7.04.00 working party sessions. In Water, Air, and Soil Pollution. - Dordrecht : Kluwer Academic Publishers, 1999, vol. 116, s. 443-448Error: read handle in (rep.epca.fmtISO690).fmtXDatabaze. Dostupné na internete: <https://link.springer.com/chapter/10.1007/978-94-017-1578-2_42>