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@article{MZM_1992_52_2_a15, author = {Yu. P. Chuburin}, title = {On the {Schr\"odinger} operator with a small potential in the case of a crystal film}, journal = {Matemati\v{c}eskie zametki}, pages = {138--143}, publisher = {mathdoc}, volume = {52}, number = {2}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1992_52_2_a15/} }
Yu. P. Chuburin. On the Schr\"odinger operator with a small potential in the case of a crystal film. Matematičeskie zametki, Tome 52 (1992) no. 2, pp. 138-143. http://geodesic.mathdoc.fr/item/MZM_1992_52_2_a15/