%0 Journal Article %A K. V. Pshennikov %T Physical process differences in the foci of weak and of strong earthquakes %J Doklady Akademii Nauk %D 1969 %P 85-87 %V 187 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_187_1_a20/ %G ru %F DAN_1969_187_1_a20