@article{MZM_2016_99_5_a4,
     author = {A. S. Krivosheev and O. A. Krivosheeva},
     title = {Fundamental {Principle} and a {Basis} in {Invariant} {Subspaces}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {684--697},
     publisher = {mathdoc},
     volume = {99},
     number = {5},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2016_99_5_a4/}
}