@article{DAN_1978_242_2_a13,
     author = {V. A. Krasnikov},
     title = {On dynamic equations for the density operators in external fields},
     journal = {Doklady Akademii Nauk},
     pages = {313--315},
     publisher = {mathdoc},
     volume = {242},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_2_a13/}
}