1. A. L. Buchachenko, Stable Radicals [in Russian], Izd. AN SSSR, Moscow (1963).
2. V. A. Rodionov and È. G. Rozantsev, Long-Living Radicals [in Russian], Nauka, Moscow (1972).
3. Ya. S. Lebedev and V. I. Muromtsev, EPR and Relaxation of Stabilized Radicals [in Russian], Khimiya, Moscow (1972).
4. A. L. Buchachenko and A. N. Vasserman, Stable Radicals [in Russian], Khimiia, Moscow (1973).
5. V. N., Parmon A. I. Kokorin, and G. M. Zhidomirov, Stable Radicals [in Russian], Nauka, Moscow (1980).