@article{TMF_1998_116_1_a5,
     author = {Yu. P. Chuburin},
     title = {Resonance multiplicity of a~perturbed periodic {Schr\"odinger} operator},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {134--145},
     year = {1998},
     volume = {116},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1998_116_1_a5/}
}