@article{MZM_2007_81_2_a1,
     author = {R. I. Aksitov},
     title = {Permutations of {Tori} in {Integrable} {Hamiltonian} {Systems} and {Spectral} {Series} of {Pseudodifferential} {Operators}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {174--183},
     publisher = {mathdoc},
     volume = {81},
     number = {2},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2007_81_2_a1/}
}