@article{MZM_2004_75_5_a17,
     author = {I. D. Tveritinov},
     title = {Relationship {Between} {Distinct} {Realizations} of {Bogolyubov} {Transformations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {797--800},
     year = {2004},
     volume = {75},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_75_5_a17/}
}