1. A. B. Vol'-Epshtein, A. A. Krichko, and T. N. Mukhina, The Composition and Means of Treatment of Liquid Pyrolysis Products [in Russian], TsNIITÉINeftekhim, Moscow (1969).
2. A. A. Krichko, ?The treatment and use of hydrogenation process catalysts,? in: The Chemistry and Treatment of Fuels [in Russian], Trudy IGI, 2nd ed., Moscow (1972), p. 66?83.
3. Kh. M. Minachev, G. V. Antoshin, and E. S. Shpiro, ?The use of x-ray photoelectron spectroscopy for the study of heterogeneous catalysis,? in: Surface Compounds in Heterogeneous Catalysis. Problems of Kinetics and Catalysis [in Russian], Vol. 16, Nauka, Moscow (1975), pp. 189?212.
4. V. V. Nemoshkalenko and V. G. Aleshin, The Electronic Spectroscopy of Crystals [in Russian], Naukova Dumka, Kiev (1976).
5. J. Escard, B. Pontvianne, M. T. Chenebaux, and J. Cosyns, ?Caractérisation par ESCA de catalyseurs á base de métaux nobles supportés. II. Étude de catalyseurs á base de platine déposé sur alumine,? Bull. Soc. Chim. France, Nos. 3?4, 349?354 (1976).