Ck Continuity of (SBR) Surfaces. - Jean-Charles Canonne; Jean-Charles Fiorot; Pierre Jeannin (Curves and Surfaces, 1991)

Planar Pythagorean-Hodograph B-Spline curves. - Gudrun Albrecht; Carolina Vittoria Beccari; Jean-Charles Canonne; Lucia Romani (Comput. Aided Geom. Des., 2017)