@article{IVM_2018_12_a3,
     author = {R. Ch. Kulaev and A. K. Pogrebkov and A. B. Shabat},
     title = {Darboux system as three-dimensional analog of {Liouville} equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {60--69},
     publisher = {mathdoc},
     number = {12},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2018_12_a3/}
}