@article{ETNA_2005__20__a6,
     author = {Mao, Shipeng and Chen, Shaochun},
     title = {Convergence analysis of the rotated ${\cal Q}_1$ element on anisotropic rectangular meshes},
     journal = {Electronic transactions on numerical analysis},
     pages = {154--163},
     publisher = {mathdoc},
     volume = {20},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2005__20__a6/}
}