%0 Journal Article %A V. N. Zharkov %A V. P. Trubitsyn %A A. A. Kalachnikov %T On the calculation of $J_6$ gravitational moment of Jupiter and Saturn %J Doklady Akademii Nauk %D 1970 %P 311-314 %V 195 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_195_2_a13/ %G ru %F DAN_1970_195_2_a13