Per Erik Koch

Construction of Exponential Tension B-splines of Arbitrary Order

Tom Lyche, Per Erik Koch, T. Lyche, 1991, Curves and Surfaces.

Interpolation with Exponential B-Splines in Tension

Tom Lyche, Per Erik Koch, T. Lyche, 1993, Geometric Modelling.

Control curves and knot insertion for trigonometric splines

Tom Lyche, Larry L. Schumaker, Marian Neamtu, 1995, Adv. Comput. Math..

Multivariate trigonometric B -splines

Per Erik Koch, P. Koch, 1988 .

An extension of the theory of orthogonal polynomials and Gaussian quadrature to trigonometric and hyperbolic polynomials

Per Erik Koch, P. Koch, 1985 .