1. Graddon DP (1968) An introduction to co-ordination chemistry, 2nd edn. Pergamon, Toronto (Chapter VI)
2. Basolo F, Johnson R (1964) Coordination chemistry. W. A. Benjamin, New York (Chapters 4–11)
3. Mackay KM, Mackay RA (1973) Introduction to modern inorganic chemistry, 2nd edn. Intext Educational, New York (Chapter 12.12)
4. Cotton FA, Wilkinson G (1966) Advanced Inorganic chemistry, 2nd edn. Wiley Interscience, New York (Chapter 27)
5. Shriver D, Weller M, Overton T, Rourke J, Armstrong F (2014) Inorganic chemistry, 6th edn. Freeman, New York (Chapter 22)