@article{MZM_2017_101_4_a2,
     author = {A. A. Vladimirov},
     title = {Representation {Theorems} and {Variational} {Principles} for {Self-Adjoint} {Operator} {Matrices}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {516--530},
     publisher = {mathdoc},
     volume = {101},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_101_4_a2/}
}