@article{IVM_1997_2_a0,
     author = {Yu. G. Borisovich},
     title = {Topological characteristics and investigation of the solvability of nonlinear problems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--23},
     year = {1997},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1997_2_a0/}
}