@article{IVM_2001_10_a10,
     author = {K. B. Sabitov and A. A. Akimov},
     title = {On the theory of an analogue of the {Neumann} problem for equations of mixed type},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {73--80},
     publisher = {mathdoc},
     number = {10},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2001_10_a10/}
}