@article{DAN_1970_192_6_a4,
     author = {A. F. Lavrik},
     title = {On zeros of periodic {Dirichlet} functions},
     journal = {Doklady Akademii Nauk},
     pages = {1214--1216},
     year = {1970},
     volume = {192},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_192_6_a4/}
}