@article{JSFU_2018_11_2_a12,
     author = {Ikrombek O. Khajiev},
     title = {Conditional correctness and approximate solution of boundary value problem for the system of second order mixed-type equations},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {231--241},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2018_11_2_a12/}
}