1. Interaction between humic acid fraction of soil and trace element cations;Basu;J. Indian Soc. Soil Sci.,1964
2. Metal complexes in soils;Beckwith;Australian J. Agr. Res.,1955
3. Titration curves of soil organic matter;Beckwith;Nature,1959
4. Formation constants for Cu(II)-peat complexes;Coleman;Science,1956
5. Détermination des constantes de stabilité des complexes organométalliques des sols;Courpron;Ann. Agron.,1967