@Article{jue:11d,
  author = 	 {A.-V. Vuong and C. Giannelli and B. J\"uttler and B. Simeon},
  title = 	 {A Hierarchical Approach to Adaptive Local Refinement in 
                  Isogeometric Analysis},
  journal = 	 {Computer Methods in Applied Mechanics and Engineering},
  pages =        {3554-3567},
  volume =       {200},
  year = 	 {2011 Dec},
  DOI = {10.1016/j.cma.2011.09.004}}