1.
Chang, R. Chemistry. (Mc Graw Hill Education, New York, 2016).
2.
Interactive 3D Structures. http://www.chemtube3d.com/solidstate/_table.htm.
3.
Housecroft, C. E. & Constable, E. C. Chemistry: An Introduction to Organic, Inorganic, and Physical Chemistry. (Prentice Hall, Harlow, 2002).
4.
Atkins, P. W. & Jones, L. Chemical Principles: The Quest for Insight. (W. H. Freeman, New York, 2010).
5.
chemguide: helping you to understand Chemistry. http://www.chemguide.co.uk/.