@article{MZM_2016_100_3_a15,
     author = {M. S. Denisov},
     title = {Spectral {Points} of {Type~}$\pi_+$ and~$\pi_-$ of {Operator-Valued} {Functions} {Taking} {Values} in the {Set} of {Unbounded} {Operators}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {469--472},
     publisher = {mathdoc},
     volume = {100},
     number = {3},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2016_100_3_a15/}
}