@InProceedings{GU07:MOS07,
author    = {Ingo Ginkel and Georg Umlauf},
title     = {Tuning subdivision algorithms using constrained energy minimization},
booktitle = {Mathematics of Surfaces XII},
year      = 2007,
publisher = {Springer-Verlag},
editor    = {R.~Martin and M.~Sabin and J.~Winkler},
pages     = {166-176}
}