%0 Journal Article %A Grzaslewicz, Ryszard %T A note on extreme contractions on $\ell _p$-spaces %J Portugaliae mathematica %D 1981 %P 413-419 %V 40 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1981__40_4_115469/ %G en %F PORMA_1981__40_4_115469