Bobbink R, Hettelingh JP.
Review and revision of empirical critical loads and dose-response relationships. Coordination Centre for Effects, National Institute for Public Health and the Environment (RIVM); 2011. Available from:
www.rivm.nl/cce Bobbink R, Heil GW.
Atmospheric deposition of sulphur and nitrogen in heathland ecosystems. In: Heathlands: Patterns and Processes in a Changing Environment. Heathlands: Patterns and Processes in a Changing Environment. Netherlands: Springer; 1993. pp. 25-50.