@article{AIHPC_1994__11_3_245_0,
     author = {Volpert, A. I. and Volpert, V. A.},
     title = {Construction of the {Leray-Schauder} degree for elliptic operators in unbounded domains},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {245--273},
     publisher = {Gauthier-Villars},
     volume = {11},
     number = {3},
     year = {1994},
     mrnumber = {1277895},
     zbl = {0835.35048},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1994__11_3_245_0/}
}