%0 Journal Article %A A. M. Gorodnitskii %A I. P. Lukashevich %A E. G. Mirlin %A E. I. Pristavakin %A O. G. Sorokhtin %T The bottom relief and gravitational field of mid-oceanic ridges as indicators of phase transitions in the upper mantle %J Doklady Akademii Nauk %D 1981 %P 827-831 %V 258 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_258_4_a13/ %G ru %F DAN_1981_258_4_a13