@article{RM_1977_32_4_a0,
     author = {Yu. G. Borisovich and V. G. Zvyagin and Yu. I. Sapronov},
     title = {Non-linear {Fredholm} maps and the {Leray--Schauder} theory},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--54},
     publisher = {mathdoc},
     volume = {32},
     number = {4},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1977_32_4_a0/}
}