@article{TMF_2009_158_1_a6,
     author = {Yu. P. Chuburin},
     title = {Quasilevels of a~two-particle {Schr\"odinger} operator with a~perturbed periodic potential},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {115--125},
     year = {2009},
     volume = {158},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_158_1_a6/}
}