@Article{jue:10b,
author =  {M. D\"orfel and B. J\"uttler and B. Simeon},
title =  {Adaptive isogeometric analysis by local $h$-refinement with 
 {T}-splines},
journal =  {Computer Methods in Applied Mechanics and Engineering},
year =  2010,
volume=199,
pages={264-175},
}