Gunar Matthies, Lutz Tobiska. Inf-sup stable non-conforming finite elements of arbitrary order on triangles. Numerische Mathematik, 102(2):293-309, 2005. [doi]
@article{MatthiesT05,
title = {Inf-sup stable non-conforming finite elements of arbitrary order on triangles},
author = {Gunar Matthies and Lutz Tobiska},
year = {2005},
doi = {10.1007/s00211-005-0648-8},
url = {http://dx.doi.org/10.1007/s00211-005-0648-8},
researchr = {https://researchr.org/publication/MatthiesT05},
cites = {0},
citedby = {0},
journal = {Numerische Mathematik},
volume = {102},
number = {2},
pages = {293-309},
}