@article{jue:12o,
author = {T. Takacs and B. J\"uttler},
title = {${H}^2$ regularity properties of singular parameterizations 
         in isogeometric analysis},
journal = {Graphical Models},
year = {2012},
volume = {74},
pages = {361-362},
doi = {10.1016/j.gmod.2012.05.006},
}