1. Critical loads of heavy metals for soils and freshwaters in the United Kingdom—an overview of current research;Ashmore,1999
2. Baker, S.J., 1997. Trace and major elements in the atmosphere at rural locations: summary of data obtained for the period 1992–1996. DETR Report AEAT-2397/20174003, AEA Technology PLC, Abingdon, Oxford.
3. Metal solubility and pathways in acidified forest ecosystems of south Sweden;Berggren;Science of the Total Environment,1990
4. The atmospheric distributions of trace metals, trace organics and nitrogen species over the North Sea;Chester;Philosophical Transactions of the Royal Society of London Series A,1993
5. De Vries, W., Bakker, D.J., 1996. Manual for calculating critical loads of heavy metals for soils and surface waters. Report 114, DLO, Winland Staring Centre, Wageningen, The Netherlands.