1. A. I. Shatenshtein, Isotopic Exchange and Substitution of Hydrogen in Organic Compounds [in Russian], Izd. Akad. Nauk SSSR, Moscow (1960).
2. D. J. Cram, Fundamentals of Carbanion Chemistry, Academic Press (1965).
3. H. F. Ebel, Die AciditÄt der CH-SÄuren, Georg Thieme Verlag, Stuttgart (1969).
4. A. I. Shatenshtein, Adv. Phys. Org. Chem., 1, 156 (1963).
5. A. Streitwieser and D. Hammons, in: New Problems in Physical Organic Chemistry [Russian translation], Mir, Moscow (1967).