Fischer, R., Lorenz, M., Köhl, M., Mues, V., Granke, O., Iost, S., . . . de Vries, W. (2010). The condition of forests in Europe: 2010 executive report. Hamburg: United Nations Economic Commission for Europe, Convention on Long-range Transboundary Air Pollution, International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests).

Fischer, Richard, Martin Lorenz, Michael Köhl, Volker Mues, Oliver Granke, Susanne Iost, Han van Dobben, Gert J. Reinds, and Wim de Vries. The Condition of Forests in Europe: 2010 Executive Report. Hamburg: United Nations Economic Commission for Europe, Convention on Long-range Transboundary Air Pollution, International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests), 2010.

Fischer, Richard, et al. The Condition of Forests in Europe: 2010 Executive Report. Hamburg: United Nations Economic Commission for Europe, Convention on Long-range Transboundary Air Pollution, International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests), 2010.