1. Maiti, R.; Sinha, G. L.: Limits on modification of epitrochoid used in rotary piston machines and the effects of modification on geometric volume displacement and ripple. Ing. Arch. 60 (1990) 183?194
2. Maiti, R.: Studies on orbital rotary piston ?LSHT? hydrostatic motor?Low speed performance and design. Unpublished Ph. D. thesis, Indian Institute of Technology, Kharagpur, India, 1990
3. Øhrberg, C. V.: Gerotor motor and ORBIT motor-operating principles and gearing. Denmark: Danfoss Techn. Bull. no HE 10A, 1970
4. Thoma, J. U.: Hydrostatic power transmission. Surrey: Trade and Technical Press Ltd. 1964