1. Biofuels: a technological perspective
2. Proceedings of the 11th World Petroleum Congress, 4;Khcheyan,1983
3. Kh.E. Khcheyan, O.M. Rovenko, A.V. Borisoglebskaya, Yu.Z. Kradkow, N.I. Yakovich, USSR Patent 639,844 (1978).
4. Pr-va Krupnotonnazh;Yakovich,1979