%0 Journal Article %A Van den Essen, Arno %T The cokernel of the operator $\partial / \partial x_n$ acting on a $\mathcal {D}_n$-module, II %J Compositio Mathematica %D 1985 %P 259-269 %V 56 %N 2 %I Martinus Nijhoff Publishers %U http://www.numdam.org/item/CM_1985__56_2_259_0/ %G en %F CM_1985__56_2_259_0