@article{IVM_1994_10_a11,
     author = {N. Kh. Khairullin},
     title = {The {Goursat} problem for quasilinear systems in invariants},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {89--90},
     publisher = {mathdoc},
     number = {10},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1994_10_a11/}
}