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2. Mechanisms and Motion;Hunt,1959
3. L. Harrisberger, Mobility analysis of a three-dimensional four link mechanism, ASME paper no. 64-WA/MD-16, 1963
4. Space crank mechanisms;Harrisberger;Mach. Des.,1964
5. Methods to identify the mobility regions of a spatial four-link mechanism;Skreiner;J. Mech.,1967