%0 Journal Article %A Roggenkamp, K. W. %T Projective ideals in clean orders %J Compositio Mathematica %D 1970 %P 197-201 %V 22 %N 2 %I Wolters-Noordhoff Publishing %U http://www.numdam.org/item/CM_1970__22_2_197_0/ %G en %F CM_1970__22_2_197_0