1. Advanced interpolation technques for NC. machines;Bedi;Trans. ASME, J. Eng. Ind.,1993
2. Biarc curves;Bolton;Comput.-Aided Des.,1975
3. Construction of a curve segment with two circular arcs;Kosugi;Trans. IEICE,1977
4. Local curve fitting procedures using circular arcs;Kosugi;Trans. IEICE,1977