@article{FAA_1975_9_1_a18,
     author = {A. R. Its and V. B. Matveev},
     title = {vHill's operator with finitely many gaps},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {69--70},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1975_9_1_a18/}
}