@article{GDZPPN001169327, title = {Error-Bounds for Finite Element Method.}, journal = {Numerische Mathematik}, volume = {15}, year = {1970}, pages = {322-333}, zbl = {0214.42001}, url = {http://dml.mathdoc.fr/item/GDZPPN001169327} }
BABUSKA, I. Error-Bounds for Finite Element Method.. Numerische Mathematik, Tome 15 (1970) pp. 322-333. http://gdmltest.u-ga.fr/item/GDZPPN001169327/