@Article{jue:07p,
  author = 	 {P. Chalmoviansk\'y and B. J\"uttler},
  title = 	 {A Non--Linear Circle--Preserving Subdivision Scheme},
  journal = 	 {Adv.\ Comp.\ Math.},
  year = 	 {2007},
  volume =       {27},
  pages =        {375-400},
}