@article{TMF_1982_52_3_a9,
     author = {V. I. Belyak and G. M. Vagradov},
     title = {Structure of the mass operator in finite {Fermi} systems},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {431--442},
     year = {1982},
     volume = {52},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1982_52_3_a9/}
}