%0 Journal Article %A Ralph de Laubenfels %T Vectors of uniqueness for id/dx %J Studia Mathematica %D 1988 %P 269-274 %V 88 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-88-3-269-274/ %R 10.4064/sm-88-3-269-274 %G en %F 10_4064_sm_88_3_269_274