@article{GDZPPN001175548,
title = {Direct and Inverse Error Estimates for Finite Elements With Mesh Refinements.},
journal = {Numerische Mathematik},
volume = {33},
year = {1979},
pages = {447-471},
zbl = {0423.65057},
url = {http://dml.mathdoc.fr/item/GDZPPN001175548}
}
Kellogg, R.B.; Pitkäranta, J.; Babuska, L. Direct and Inverse Error Estimates for Finite Elements With Mesh Refinements.. Numerische Mathematik, Tome 33 (1979) pp. 447-471. http://gdmltest.u-ga.fr/item/GDZPPN001175548/