@article{TMF_1985_65_3_a9,
     author = {N. N. Bogolyubov (Jr.) and V. N. Plechko},
     title = {Perturbation theory in the polaron model at finite temperature},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {423--434},
     year = {1985},
     volume = {65},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1985_65_3_a9/}
}