@article{EMJ_2017_8_2_a3,
     author = {M. A. Sadybekov and N. S. Imanbaev},
     title = {Characteristic determinant of a boundary value problem, which does not have the basis property},
     journal = {Eurasian mathematical journal},
     pages = {40--46},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2017_8_2_a3/}
}