@article{IVM_2007_4_a8,
     author = {E. A. Utkina},
     title = {Increase of order of normal derivatives in the {Goursat} boundary value problem},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {79--83},
     publisher = {mathdoc},
     number = {4},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2007_4_a8/}
}