@article{TMF_1971_7_2_a9,
     author = {Yu. A. Tserkovnikov},
     title = {Decoupling of chains of equations for two-time {Green's} functions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {250--261},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_7_2_a9/}
}