1. Yu. G. Kryazhev, L. F. Svishchenko, and N. P. Radimov, Investigation of Petroleum and Coal Pitches for the Preparation of Carbon Fibres and Composite Materials [in Russian], NIITÉKhIM, Moscow (1982).
2. Inventor's Certificate 761492, 1980 (USSR).
3. A. A. Sidorenko, Yu. G. Kryazhev, et al., Reaction Kinetics and Catalysis Letters,6, 1?8 (1977).
4. A. A. Sidorenko, V. M. Bogolyubov, and Yu. G. Kryazhev, Investigation of the Inhibiting Ability of High-Molecular-Weight Components in Sulfur-Containing Petroleums [in Russian], Summaries of Reports at the 9th International Symposium on the Chemistry of Organic Compounds, Riga (1980), p. 329.
5. T. G. Dzhashiashvili, Yu. G. Kryazhev, O. Kirret, and A. Kogerman, Izv. Akad. Nauk ÉSSR,34, No. 2, 150 (1985).