8Waldron K J,Strong R T. Improved solutions of the branch and order problems burmester linkage synthesiskJJ[J].Mechanism and Machine Theory,1978,(02):199-207.
9Waldron K J. Elimination of the branch problem in graphical burmester mechanism synthesis for four finitely sepa- rated positions[J].Journal of Engineering for Industry,Transactions of the ASME,1976,(02):177.
10PRENTIS J M. The pole triangle,burmester theory and order and branch problem: I (the order problem)[J].Meeh Mach Theory,1991,(01):19-30.
