@article{FAA_1986_20_1_a20,
     author = {D. Schenk and M. A. Shubin},
     title = {Asymptotic expansion of the spectral function of the {Hill} operator},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {89--90},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1986_20_1_a20/}
}