@article{TMF_1971_6_1_a0,
     author = {A. S. Holevo},
     title = {Quasi-free states on~the~$C^*$ algebra {of~CCR}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {3--20},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_6_1_a0/}
}