@article{IVM_1996_5_a4,
     author = {V. M. Deundyak},
     title = {Homotopic classification and calculation of the index of families of multidimensional bisingular integral operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {34--46},
     year = {1996},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1996_5_a4/}
}