1. M. Weller , T.Overton , J.Rourke and F.Armstrong , Inorganic Chemistry , Oxford University Press , Oxford, UK , 7th edn, 2018 , pp. 568–574 and 600–601
2. A. B. P. Lever , Inorganic Electronic Spectroscopy , Elsevier , Amsterdam , 2nd edn, 1984
3. Emerging trends in spin crossover (SCO) based functional materials and devices
4. Preface and introduction