@article{SM_1985_52_2_a7,
     author = {E. L. Korotyaev},
     title = {On the eigenfunctions of the monodromy operator of the {Schr\"odinger} operator with a~time-periodic potential},
     journal = {Sbornik. Mathematics},
     pages = {423--438},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1985_52_2_a7/}
}