@article{1050426033, author = {Volpert, V. and Volpert, A.}, title = {Properness and topological degree for general elliptic operators}, journal = {Abstr. Appl. Anal.}, volume = {2003}, number = {7}, year = {2003}, pages = { 129-181}, language = {en}, url = {http://dml.mathdoc.fr/item/1050426033} }
Volpert, V.; Volpert, A. Properness and topological degree for general elliptic operators. Abstr. Appl. Anal., Tome 2003 (2003) no. 7, pp. 129-181. http://gdmltest.u-ga.fr/item/1050426033/