@article{NUMA_1980__36_132688,
     author = {P. Lesaint and M. Zl\'amal},
     title = {Convergence of the {Nonconforming} {Wilson} {Element} for {Arbitrary} {Quadrilateral} {Meshes.}},
     journal = {Numerische Mathematik},
     pages = {33--52},
     publisher = {mathdoc},
     volume = {36},
     year = {1980},
     zbl = {0471.65073},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1980__36_132688/}
}