@article{M2AN_2013__47_3_689_0,
     author = {Kim, Imbunm and Luo, Zhongxuan and Meng, Zhaoliang and NAM, Hyun and Park, Chunjae and Sheen, Dongwoo},
     title = {A piecewise $P_2$-nonconforming quadrilateral finite element},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {689--715},
     publisher = {EDP-Sciences},
     volume = {47},
     number = {3},
     year = {2013},
     doi = {10.1051/m2an/2012044},
     zbl = {1270.65067},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/m2an/2012044/}
}