1. Almer, B., Dickson, W.. Ekström, C. & Hörnström, E. (1978). Sulfur pollution and the aquatic ecosystem. In: Nriagu, J.O. (Ed.) Sulfur in the environment. II. Ecological impact (pp. 271–311). Wiley.
2. Arts, G. H. P., van Dam, H., Wortelboer, F. G., van Beers, P. W. M., & Belgers, J. D. M. (2002). De toestand van het Nederlandse ven. AquaSense, RIVM: Alterra.
3. Austnes, K., Aherne, A. J., Cicendajeva, M., Couture, S., Fölster, J., Garmo, Ø., Hruska, J., Monteith, D., Posch, M., Rogora, M., Sample, J., Skjelkvåle, B. L., Steingruber, S., Stoddard, J. L., Ulanczyk, R., van Dam, H., Toro Velasco, M., Vuorenmaa, J., Wright, R. F. & de Wit, H. (2018). Regional assessment of the current extent of acidification of surface waters in Europe and North America. Norwegian Institute for Water Research.
4. Bakke, S. J., Ionita, M., & Tallaksen, L. M. (2020). The 2018 northern European hydrological drought and its drivers in a historical perspective. Hydrology and Earth System Sciences, 24, 5621–5653.
5. Buijsman, E., & Erisman, J. W. (1988). Wet deposition of ammonium in Europe. Journal of Atmospheric Chemistry, 6, 265–280.