1. V. N. Pokorskii, in: Liquid Extraction and Chemisorption Processes [in Russian], Khimiya, Moscow-Leningrad (1966), pp. 32?40.
2. N. F. Grishchenko, V. N. Pokorskii, and M. N. Yablochkina, in: Liquid Extraction Processes [in Russian], Gostoptekhizdat, Leningrad (1963), pp. 305?310.
3. L. P. Shapiro and B. I. Brounshtein, in: Theoretical Principles of Chemical Engineering [in Russian], GIPKh, Leningrad (1976), pp. 35?39.
4. M. N. Yablochkina et al., Neftepererab. Neftekhim., No. 4, 34?35 (1975).
5. B. I. Grinchishin et al., Neftepererab. Neftekhim., No. 1, 28?29 (1977).