@Article{jue:09a,
author =  {M. Aigner and L. Gonzalez-Vega and B. J\"uttler and J. Schicho},
title = {Parameterizing surfaces with certain special support functions, including offsets of quadrics and rationally supported surfaces},
journal = {J. Symb. Comp.},
year = {2009},
volume = {44},
pages = {180--191},
note = {no. 2},
}