@article{MZM_2016_100_3_a9,
     author = {K. B. Sabitov},
     title = {Solutions of {Fixed} {Sign} of {Higher-Order} {Inhomogeneous} {Equations} of {Mixed} {Elliptic-Hyperbolic} {Type}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {433--440},
     publisher = {mathdoc},
     volume = {100},
     number = {3},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2016_100_3_a9/}
}