@article{TMF_2014_178_3_a4,
     author = {S. N. Lakaev and Sh. U. Alladustov},
     title = {Positivity of eigenvalues of the~two-particle {Schr\"odinger} operator on a~lattice},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {390--402},
     publisher = {mathdoc},
     volume = {178},
     number = {3},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2014_178_3_a4/}
}