@article{TMF_1984_61_3_a7,
     author = {N. V. Tkach},
     title = {System of exact equations for the mass operator of quasiparticles interacting with phonons},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {400--407},
     publisher = {mathdoc},
     volume = {61},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1984_61_3_a7/}
}