%0 Journal Article %A K. I. Gringauz %A M. I. Verigin %A T. K. Breus %A T. Gomboshi %T Electron flows, measured in optical shadow of Venus aboard the Venera-9 and Venera-10 satellites, as a main source of the ionization in Venusian nocturnal ionosphere %J Doklady Akademii Nauk %D 1977 %P 1039-1042 %V 232 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_232_5_a15/ %G ru %F DAN_1977_232_5_a15