@Article{jue:06a,
  author = 	 {M.L. Sampoli and M. Peternell and B.\ J\"uttler},
  title = 	 {Rational Surfaces with Linear Normals and their Convolutions with Rational Surfaces},
  journal = 	 {Comp.\ Aided Geom.\ Design},
  year = 	 {2006},
  volume = {23},
  pages= {179--192}
}