@article{DAN_1967_177_6_a1,
     author = {M. P. Ershov},
     title = {A limit theorem for the number of level crossings by a stationary {Gaussian} process},
     journal = {Doklady Akademii Nauk},
     pages = {1259--1262},
     publisher = {mathdoc},
     volume = {177},
     number = {6},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a1/}
}