@article{IM2_1984_22_3_a6,
     author = {M. M. Skriganov},
     title = {The multidimensional {Schr\"odinger} operator with a~periodic potential},
     journal = {Izvestiya. Mathematics },
     pages = {619--645},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_22_3_a6/}
}