@article{MZM_2003_73_4_a6,
     author = {S. N. Lakaev and T. H. Rasulov},
     title = {A {Model} in the {Theory} of {Perturbations} of the {Essential} {Spectrum} of {Multiparticle} {Operators}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {556--564},
     publisher = {mathdoc},
     volume = {73},
     number = {4},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_4_a6/}
}