@article{GDZPPN001185470, title = {A posteriori error estimates for linear equations.}, journal = {Numerische Mathematik}, volume = {63}, year = {1992}, pages = {1-6}, zbl = {0747.65027}, url = {http://dml.mathdoc.fr/item/GDZPPN001185470} }
Auchmuty, Giles. A posteriori error estimates for linear equations.. Numerische Mathematik, Tome 63 (1992) pp. 1-6. http://gdmltest.u-ga.fr/item/GDZPPN001185470/