@article{IVM_2020_4_a3,
     author = {R. Ch. Kulaev and A. B. Shabat},
     title = {Darboux system and separation of variables in the {Goursat} problem for a third order equation in $\mathbb {R}^3$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {43--53},
     publisher = {mathdoc},
     number = {4},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2020_4_a3/}
}