@article{UFA_2020_12_4_a5,
     author = {Kh. K. Ishkin and R. I. Marvanov},
     title = {On localization conditions  for   spectrum of   model operator for   {Orr--Sommerfeld} equation},
     journal = {Ufa mathematical journal},
     pages = {64--77},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2020_12_4_a5/}
}