[1] F. Chalmers, What is this thing called Science? 3rd ed., Open University Press (1999).
[2] L. Stevenson, H. Byerly, The Many Faces of Science, Westview Press, (1995).
[3] H.-J. Quadbeck-Seeger, World Records in Chemistry, Wiley-VCH, (1999).
[4] J.E. McClellan, H. Dorn, Science and Technology in World History, Johns Hopkins University Press, (1999).
[5] W.H. Brock, The Fontana History of Chemistry, Fontana Press, (1992).
[6] P.A.M. Dirac, Proc.R.Soc.Lond.Ser.A 123 (1929) 714.
[7] W. Kutzelnigg, Theor.Chem.Acc. 103 (2000) 182.