@article{IZKAB_2008_6_a0,
     author = {Kh. G. Bzhikhatlov},
     title = {Quasi-linear equations of mixed type
},
     journal = {News of the Kabardin-Balkar scientific center of RAS},
     pages = {134--141},
     publisher = {mathdoc},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IZKAB_2008_6_a0/}
}