1. Atomic and Molecular Radiation Physics;Christophorou,1971
2. D. Smith, P. Španěl, Mass Spectrom. Rev. 14 (1995) 255, and references therein.
3. L.G. Christophorou, D.L. McCorkle, A.A. Christodoulides, in Electron–Molecule Interactions and Their Applications, Vol. 1, Academic, New York, 1984, Chap. 6, p. 496.
4. Collision Phenomena in Ionized Gases;McDaniel,1964
5. Negative Ions;Massey,1976