@article{ZNSL_1980_96_a11,
     author = {E. L. Korotyaev},
     title = {On the spectrum of monodromy operator of the {Schr\"odinger} operator with a~potential which is periodic with respect to time},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {101--104},
     publisher = {mathdoc},
     volume = {96},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1980_96_a11/}
}