1. D.J.E. Ingram, Free radicals studied by electron spin resonance (Butterworths, London, 1958)
2. L.A. Blumenfeld, V.V. Voevodskii, A.G. Semenov, Application of EPR in chemistry (SB AN SSSR Publ, Novosibirsk, 1962)
3. D.J.E. Ingram, Biological and biochemical applications of electron spin resonance (Adam Hilger Ltd., London, 1969)
4. G.I. Likhtenshtein, The method of spin labels in molecular biology (Nauka, Moscow, 1974); spin labeling methods in molecular biology (Wiley, New York, 1976)
5. L.J. Berliner (ed.), Spin labelling. Theory and applications (Academic Press, New York, 1976)