1. N. I. Gal'perin, V. G. Ainshtein, and V. G. Kvasha, Principles of Air Fluidization Technique [in Russian], Moscow (1967).
2. D. Kunii and O. Levenshpil', Industrial Air Fluidization [in Russian], Moscow (1976).
3. P. G. Romankov and N. B. Rashkovskaya, Drying in a Fluidized State [in Russian], 2nd Edition, Leningrad (1968).
4. E. P. Ustyanich, A. I. Chernyavskii, and T. A. Groshovyi, in: Heat- and Mass Exchange [in Russian], Vol. 5, Part 2, Kiev (1972), pp. 60–65.
5. Yu. B. Borisenko, “Studies in the field of the preparation of enterically soluble medicinal forms,” Candidate's Dissertation, Kharkov (1968).