1. Borggaard, O.K., 1990. Dissolution and Adsorption Properties of Soil Iron Oxides. DSc Thesis. Royal Veterinary and Agricultural University, Copenhagen.
2. Soil Chemistry in a Pedological Context;Borggaard,2002
3. Estimation of critical phosphate loads in Danish sandy soils;Borggaard,1991
4. Influence of organic matter on phosphate adsorption by aluminium and iron oxides in sandy soils;Borggaard;J. Soil Sci.,1990
5. Glyphosate sorption in soils of different pH and phosphorus content;De Jonge;Soil Sci.,2001