Richard H. Bartels John C. Beatty Kellogg S. Booth Eric G. Bosch Pierre Jolicoeur Experimental Comparison of Splines Using the Shape-Matching Paradigm. 179-208 1993 12 ACM Trans. Graph. 3 http://doi.acm.org/10.1145/169711.169709 db/journals/tog/tog12.html#BartelsBBBJ93