@article{TMF_1997_113_2_a2,
     author = {A. A. Bormisov and E. S. Gudkova and F. Kh. Mukminov},
     title = {On integrability of {Rikkati-type} systems of hyperbolic equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {261--275},
     publisher = {mathdoc},
     volume = {113},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1997_113_2_a2/}
}