@article{GDZPPN001180304,
title = {Asymptotic Error Expansion and Richardson Extrapolation for Linear Finite Elements.},
journal = {Numerische Mathematik},
volume = {50},
year = {1986},
pages = {11-38},
zbl = {0594.65082},
url = {http://dml.mathdoc.fr/item/GDZPPN001180304}
}
Rannacher, R.; Blum, H.; Lin, Q. Asymptotic Error Expansion and Richardson Extrapolation for Linear Finite Elements.. Numerische Mathematik, Tome 50 (1986) pp. 11-38. http://gdmltest.u-ga.fr/item/GDZPPN001180304/