%0 Journal Article %A Raynaud, Yves %T Some remarks on ultrapowers and superproperties of the sum and interpolation spaces of Banach spaces %J Compositio Mathematica %D 1991 %P 295-319 %V 79 %N 3 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1991__79_3_295_0/ %G en %F CM_1991__79_3_295_0