@article{DAN_1962_146_4_a18,
     author = {A. R. Frenkin},
     title = {Green's functions in the theory of strong coupling},
     journal = {Doklady Akademii Nauk},
     pages = {805--807},
     publisher = {mathdoc},
     volume = {146},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_146_4_a18/}
}