@article{GDZPPN002239582,
title = {Besov Regularity for Second Order Elliptic Boundary Value Problems with Variable Coefficients.},
journal = {Manuscripta mathematica},
volume = {95},
year = {1998},
pages = {59-78},
zbl = {0895.35017},
url = {http://dml.mathdoc.fr/item/GDZPPN002239582}
}
Dahlke, Stephan. Besov Regularity for Second Order Elliptic Boundary Value Problems with Variable Coefficients.. Manuscripta mathematica, Tome 95 (1998) pp. 59-78. http://gdmltest.u-ga.fr/item/GDZPPN002239582/