@article{MT_1994_26_a2,
     author = {G. V. Demidenko and I. I. Matveeva},
     title = {Boundary value problems in a quarter-space for systems that are not of {Cauchy{\textendash}Kovalevskaya} type},
     journal = {Matemati\v{c}eskie trudy},
     pages = {42--76},
     year = {1994},
     volume = {26},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1994_26_a2/}
}