@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/