@Article{jue:14f,
  author = {D. Mokri\v{s} and B. J\"uttler and C. Giannelli},
  title =  {On the completeness of hierarchical tensor-product 
           {B}-splines},
  year = {2014}, 
  journal = {J. Comp. Appl. Math.},
  volume = {271}, 
  pages = {53-70}, 
  doi = {10.1016/j.cam.2014.04.001},
}