Piegl L,Tiller M. The NURBS Book[M]. 2nd ed. Berlin: Springer, 1997. 141-188.
[3]
Marnar E, Pena J M, Sanchez- Rayes J, et al. Shape preserving alternatives to the rational Bezier model [J] . Computer Aided Geometric Design,2001,18( 1 ) : 37-60.
[4]
Schoenberg I J. On trigonometric spline interpolation [J]. Journal of Mathematics and Mechanics, 1964,13(5 ) :795-825.
[5]
Lyche T,Winther R. A stable recurrence relation for trigonometric B- splines [J] . Journal of Approximation Theory, 1979, 25 ( 2 ) : 266-279.
[6]
Lyche T, Schumaker L L. Quasi-interpolations on trigonometric B-spline [J]. Journal of Approximation Theory, 1998, 95 ( 2 ) : 280-309.
