@article{DE_1974_10_4_a6,
     author = {V. V. Dyakin and V. P. Shirokovskii},
     title = {Zeros of the eigenfunctions of a quasiperiodic problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {624--628},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_4_a6/}
}