@article{SMAI-JCM_2019__S5__67_0,
     author = {Mario Kapl and Giancarlo Sangalli and Thomas Takacs},
     title = {Isogeometric analysis with $C^1$ functions  on planar, unstructured quadrilateral meshes},
     journal = {The SMAI Journal of computational mathematics},
     pages = {67--86},
     publisher = {Soci\'et\'e de Math\'ematiques Appliqu\'ees et Industrielles},
     volume = {S5},
     year = {2019},
     doi = {10.5802/smai-jcm.52},
     zbl = {07038597},
     language = {en},
     url = {https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.52/}
}