1. R.A. Bernheim: Optical Pumping, an Introduction (Benjamin, New York 1965)
2. B. Budick: ‘Optical pumping methods in atomic spectroscopy’. In: Adv. At. Mol. Phys. 3, 73 (Academic, New York 1967)
3. R.N. Zare: ‘Optical pumping of molecules’. In: Int’l Colloquium on Doppler-Free Spectroscopic Methods for Simple Molecular Systems (CNRS, Paris 1974) p. 29
4. M. Broyer, G. Gouedard, J.C. Lehmann, J. Vigue: ‘Optical pumping of molecules’. In: Adv. At. Mol. Phys. 12, 164 (Academic, New York 1976).
5. G. zu Putlitz: ‘Determination of nuclear moments with optical double resonance’. Springer Tracts Mod. Phys. 37, 105 (Springer, Berlin, Heidelberg 1965).