@ARTICLE{JuMa16,
  author = {Bert J{\"u}ttler and Angelos Mantzaflaris and Ricardo Perl and Martin Rumpf},
  journal = {Computer Methods in Applied Mechanics and Engineering},
  title = {On numerical integration in isogeometric subdivision methods for {PDEs} on surfaces},
  year = {2016},
  issn = {0045-7825},
  pages = {131--146},
  volume = {302},
  doi = {10.1016/j.cma.2016.01.005},

}