%0 Journal Article %A A. G. Gamburtsev %T On the periodic variations of the time series at the Earth's crust seismic monitoring %J Doklady Akademii Nauk %D 1987 %P 64-67 %V 297 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_297_1_a14/ %G ru %F DAN_1987_297_1_a14