@article{GDZPPN002228238, title = {Convergence Rates for intermediate problems.}, journal = {Manuscripta mathematica}, volume = {58}, year = {1987}, pages = {209-228}, zbl = {0652.49030}, url = {http://dml.mathdoc.fr/item/GDZPPN002228238} }
Greenlee, W.M.; Beattie, Christopher. Convergence Rates for intermediate problems.. Manuscripta mathematica, Tome 58 (1987) pp. 209-228. http://gdmltest.u-ga.fr/item/GDZPPN002228238/