@article{VMUMM_2002_4_a1,
     author = {I. D. Tveritinov},
     title = {Bogolyubov transformations that correspond to symplectic transformations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {9--14},
     publisher = {mathdoc},
     number = {4},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2002_4_a1/}
}