1. Speciation of copper in soil solutions from podzols and cambisols of S. Sweden;Berggren;Water, Air, Soil Pollut.,1992
2. Location of trace elements in soil profiles. Total and extractable contents of individual horizons;Berrow;Trans. R. Soc. Edinb. Earth Sci.,1980
3. Origin of extractable titanium and vanadium in the A horizon of Scottish podzols;Berrow;Geoderma,1978
4. Copper retention by Danish spodosols in relation to contents of organic matter and aluminium, iron, and manganese oxides;Bibak;Commun. Soil Sci. Plant Anal.,1997
5. Cobalt retention by Danish spodosols in relation to contents of organic matter and aluminium, iron and manganese oxides;Bibak;Acta Agric. Scand., Sect. B,1995