@article{TMF_2009_160_1_a5,
     author = {M. Gianfreda and G. Landolfi and M. G. A. Paris},
     title = {Quantum phase problem for harmonic and time-dependent oscillator systems},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {59--68},
     publisher = {mathdoc},
     volume = {160},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_160_1_a5/}
}