@article{702243, title = {Mapping properties of regular and strongly degenerate elliptic differential operators in the Besov spaces $B^s\_{p,p}(\Omega )$. The case $0<p<\infty $ }, booktitle = {Equadiff IV}, series = {GDML\_Books}, publisher = {Springer-Verlag}, address = {Berlin}, year = {1979}, pages = {[424]-432}, mrnumber = {MR0535363}, zbl = {0409.35034}, url = {http://dml.mathdoc.fr/item/702243} }
Triebel, H. Mapping properties of regular and strongly degenerate elliptic differential operators in the Besov spaces $B^s_{p,p}(\Omega )$. The case $0Equadiff IV, GDML_Books, (1979), pp. [424]-432. http://gdmltest.u-ga.fr/item/702243/