1. Meirovitch, L.: Elements of Vibration Analysis, 2nd edn, pp. 300–328, p. 284. McGraw-Hill Co., New York (1986)
2. Motoi, H., Kitamura, A., Sakazume, N., Uchiumi, M., Uchida, M., Saiki, K., Nozaki, O., Iwatsubo, T.: Sub-synchronous whirl in The LE-7A rocket engine fuel turbo-pump. Second International Symposium on Stability Control of Rotating Machinery ISCORMA-2, 2003
3. Rachuk, V., Dmitrenko, A., Buser, M., Minick, A.: Single shaft turbopump expands capabilities of upper stage liquid propulsion. Proceedings of the 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, AIAA-2008-4946, July 2008