@article{TMF_2009_158_2_a6,
     author = {S. N. Lakaev and A. M. Khalkhuzhaev},
     title = {The~number of eigenvalues of the~two-particle discrete {Schr\"odinger
}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {263--276},
     publisher = {mathdoc},
     volume = {158},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_158_2_a6/}
}