@article{MZM_1969_5_6_a6,
     author = {M. G. Gimadislamov},
     title = {The self-adjointness conditions for a~higher order differential operator with an~operator coefficient},
     journal = {Matemati\v{c}eskie zametki},
     pages = {697--707},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_6_a6/}
}