@article{DAN_1966_170_4_a18,
     author = {S. I. Kubarev and V. V. Pomortsev},
     title = {Non-simultaneous decoupling for a model electron-phonon {Hamiltonian}},
     journal = {Doklady Akademii Nauk},
     pages = {815--818},
     publisher = {mathdoc},
     volume = {170},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_4_a18/}
}