@article{TMF_2000_123_1_a6,
     author = {Zh. I. Abdullaev},
     title = {Essential {Schr\"odinger} operator spectrum of one system of four particles on a lattice},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {81--87},
     publisher = {mathdoc},
     volume = {123},
     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_123_1_a6/}
}