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2. Ehrich, F.F.: Subharmonic vibration of rotors in bearing clearance. ASME Paper No. 66-MD-1 (1966)
3. Bently, D.E.: Forced subrotative speed dynamic action of rotating machinery. ASME Paper No. 74-Pet-16 (1974)
4. Botman, M.: Experiments on oil film dampers for turbomachinery. ASME J. Eng. Power 98, 393–400 (1976)
5. Nikolajsen, J.I., Holmes, R.: Investigation of squeeze-film isolators for the vibration control of a flexible rotor. ASME J. Mech. Sci. 21(4), 247–252 (1979)