%0 Journal Article %A Van Dulst, D. %T On strictly singular operators %J Compositio Mathematica %D 1971 %P 169-183 %V 23 %N 2 %I Wolters-Noordhoff Publishing %U http://www.numdam.org/item/CM_1971__23_2_169_0/ %G en %F CM_1971__23_2_169_0