@article{SJIM_2021_24_2_a4,
     author = {A. A. Kosov and E. I. Semenov and V. V. Tirskikh},
     title = {On exact multidimensional solutions to a nonlinear system of fourth-order hyperbolic equations},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {77--86},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2021_24_2_a4/}
}