@article{DAN_1988_301_2_a16,
     author = {V. I. Belinicher and S. G. Tikhodeev},
     title = {The {Wyld} diagram technique -- a classical limit of the {Keldysh} technique for nonequilibrium processes},
     journal = {Doklady Akademii Nauk},
     pages = {326--328},
     publisher = {mathdoc},
     volume = {301},
     number = {2},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_301_2_a16/}
}