%0 Journal Article %A Roberts, Leslie G. %A Singh, Balwant %T Subintegrality, invertible modules and the Picard group %J Compositio Mathematica %D 1993 %P 249-279 %V 85 %N 3 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1993__85_3_249_0/ %G en %F CM_1993__85_3_249_0