@article{JMAG_2017_13_2_a3,
     author = {V. N. Levchuk},
     title = {On one class of non-dissipative operators},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {173--194},
     year = {2017},
     volume = {13},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2017_13_2_a3/}
}