@InProceedings{Uml04,
author    = {Georg Umlauf},
title     = {A technique for verifying the smoothness of subdivision schemes},
booktitle = {Geometric Modeling and Computing: Seattle 2003},
year      = 2004,
publisher = {Nashboro Press},
editor    = {M.L.~Lucian and M.~Neamtu},
pages     = {513-521}
}