@article{GDZPPN001176218,
title = {Convergence of the Nonconforming Wilson Element for Arbitrary Quadrilateral Meshes.},
journal = {Numerische Mathematik},
volume = {35},
year = {1980},
pages = {33-52},
zbl = {0471.65073},
url = {http://dml.mathdoc.fr/item/GDZPPN001176218}
}
Lesaint, P.; Zlámal, M. Convergence of the Nonconforming Wilson Element for Arbitrary Quadrilateral Meshes.. Numerische Mathematik, Tome 35 (1980) pp. 33-52. http://gdmltest.u-ga.fr/item/GDZPPN001176218/