@article{MT_2010_13_1_a7,
     author = {M. I. Muminov and U. R. Shodiev},
     title = {On the essential spectrum of a~four-particle {Schr\"odinger} operator on a~lattice},
     journal = {Matemati\v{c}eskie trudy},
     pages = {169--185},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2010_13_1_a7/}
}