@Article{jue:08d,
  author = 	 {R.\ Feichtinger and M.\ Fuchs and B.\ J\"uttler and O.\ Scherzer and Huaiping Yang},
  title = 	 {Dual Evolution of Planar Parametric Spline Curves and {T}--spline Level Sets},
  journal = 	 {Computer-Aided Design},
  year = 	 {2008},
  volume =       {40},
  pages=         {13-24},
}