@article{IVM_1991_11_a11,
     author = {A. A. Soloviev},
     title = {On the index of the operator of the {Dirichlet} problem in a~domain with a~piecewise-smooth or {Radon} boundary},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {60--66},
     year = {1991},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_11_a11/}
}