%0 Journal Article %A Hall, R. R. %A Tenenbaum, G. %T The average orders of Hooley’s $\Delta _r$-functions, II %J Compositio Mathematica %D 1986 %P 163-186 %V 60 %N 2 %I Martinus Nijhoff Publishers %U http://www.numdam.org/item/CM_1986__60_2_163_0/ %G en %F CM_1986__60_2_163_0