@article{SJVM_2020_23_2_a2,
     author = {A. V. Kel'manov and L. V. Mikhailova and P. S. Ruzankin and S. A. Khamidullin},
     title = {The
},
     journal = {Sibirskij \v{z}urnal vy\v{c}islitelʹnoj matematiki},
     pages = {127--142},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJVM_2020_23_2_a2/}
}