@article{TMF_1969_1_1_a9,
     author = {D. N. Zubarev and V. P. Kalashnikov},
     title = {Extremal properties of the nonequilibrium statistical operator},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {137--149},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1969_1_1_a9/}
}