%0 Journal Article %A M. P. Ershov %T A limit theorem for the number of level crossings by a stationary Gaussian process %J Doklady Akademii Nauk %D 1967 %P 1259-1262 %V 177 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a1/ %G ru %F DAN_1967_177_6_a1