Smooth Paths in a Polygonal Channel. - David Lutterkort; Jörg Peters 001 (SCG, 1999)

Polynomial degree reduction in the L2-norm equals best Euclidean approximation of Bézier coefficients. - David Lutterkort; Jörg Peters 001; Ulrich Reif (Comput. Aided Geom. Des., 1999)

Sharp, quantitative bounds on the distance between a polynomial piece and its Bézier control polygon. - D. Nairn; Jörg Peters 001; David Lutterkort (Comput. Aided Geom. Des., 1999)

Envelopes of nonlinear geometry - David Lutterkort (2000)

Optimized refinable enclosures of multivariate polynomial pieces. - David Lutterkort; Jörg Peters 001 (Comput. Aided Geom. Des., 2001)

Tight linear envelopes for splines. - David Lutterkort; Jörg Peters 001 (Numerische Mathematik, 2001)