1. “An Introduction to Transition-Metal Chemistry, Ligand-Field Theory”;Orgel,1960
2. Termaufspaltung in Kristallen
3. “Theory of Electric and Magnetic Susceptibilities”;Van Vleck,1932
4. “Theory of Transition Metal Ions”;Griffith,1961
5. Actes 2e Congr. Int. Catal.;Dowden,1961