@Article{jue:07b,    
  author = 	 {M. Shalaby and B. J\"uttler and J.\ Schicho},
  title = 	 {Approximate Implicitization of Planar Curves by Piecewise Rational Approximation of the Distance Function},
  journal = 	 {Appl.\ Algebra Eng.\ Comm.\ Comp.},
  year = 	 {2007},
  volume =	 {18},
  pages =	 {71--89}
}