1. Heavy Metal in Soils;Alloway,1995
2. Zinc, Metal Series No. 2, in: A. Langley, S. Mangas (Eds.), National Environmental Health Monographs, National Environmental Health Forum, USA, 1997
3. Copper, Metal Series No.3, National Environmental Health Monographs, National Environmental Health Forum, 1997
4. Study on data requirements and programme for data production and gathering to support a future evaluation of the risks to health and the environment from cadmium in fertilizers, European Commission Directorate General III, Environmental Resources Management, 8 Cavendish Square, London W1MOER, 1999
5. Adsorption-Desorption Characteristics of Cadmium in Variable Charge Soils