@article{DAN_1966_168_4_a12,
     author = {N. N. Bogolyubov (Jr.)},
     title = {Green's functions for model hamiltonians},
     journal = {Doklady Akademii Nauk},
     pages = {766--769},
     publisher = {mathdoc},
     volume = {168},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_168_4_a12/}
}