@InCollection{jue:07g, author = {Huaiping Yang and B. J\"uttler}, title = {Fitting Implicitly Defined Curves to Unorganized Points with Sharp Features}, booktitle = {Curve and Surface Design: Avignon 2006}, publisher = {Nashboro Press}, year = {2007}, editor = {P. Chenin and T. Lyche and L.L.\ Schumaker}, pages = {274--283}, }