1. Williams BG (ed) (1977) Compton scattering. McGraw-Hill, New York
2. See for example: Brion CE (1986) Int J Quantum Chem 29: 1397
3. Coulson CA, Duncanson WE (1941) Proc Camb Philos Soc 37: 55, 67, 74, 397, 406
4. See for example: Epstein IR, Tanner AC (1977) In: Williams, New York; Rawlings DC, Davidson ER (1985) J Phys Chem 89: 969 and references therein
5. Johnson MA, Maggiora GM (eds) (1990) Concepts and applications of molecular similarity. Wiley, New York