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@article{IM_1992__110_2_144043, author = {G.D. Raikov}, title = {Eigenvalue asymptotics for the {Schr\"odinger} operator with perturbed periodic potential.}, journal = {Inventiones mathematicae}, pages = {75--94}, publisher = {mathdoc}, volume = {110}, number = {2}, year = {1992}, zbl = {0801.35095}, url = {http://geodesic.mathdoc.fr/item/IM_1992__110_2_144043/} }
G.D. Raikov. Eigenvalue asymptotics for the Schrödinger operator with perturbed periodic potential.. Inventiones mathematicae, Tome 110 (1992) no. 2, pp. 75-94. http://geodesic.mathdoc.fr/item/IM_1992__110_2_144043/