@article{M2AN_1999__33_4_747_0,
     author = {Douglas, Jim Jr. and Santos, Juan E. and Sheen, Dongwoo and Ye, Xiu},
     title = {Nonconforming {Galerkin} methods based on quadrilateral elements for second order elliptic problems},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {747--770},
     publisher = {EDP-Sciences},
     volume = {33},
     number = {4},
     year = {1999},
     mrnumber = {1726483},
     zbl = {0941.65115},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1999__33_4_747_0/}
}