@article{IVM_2001_11_a3,
     author = {K. B. Sabitov and R. G. Idrisov},
     title = {The {Gellerstedt} problem for systems of equations of mixed type},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {22--34},
     publisher = {mathdoc},
     number = {11},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2001_11_a3/}
}