@article{CMFD_2010_35_a4,
     author = {V. G. Zvyagin and E. S. Baranovskii},
     title = {Topological degree of condensing multi-valued perturbations of the $(S)_+$-class maps and its applications},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {60--77},
     publisher = {mathdoc},
     volume = {35},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2010_35_a4/}
}