@article{DAN_1961_141_4_a16,
     author = {V. V. Tolmachev},
     title = {The shift of the branch point in the mass operator of formal perturbation theory for a nonideal {Fermi--Dirac} system},
     journal = {Doklady Akademii Nauk},
     pages = {829--832},
     publisher = {mathdoc},
     volume = {141},
     number = {4},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_4_a16/}
}