%0 Journal Article %A Francoise Lust-Piquard %T Lower bounds on //K...//1...... For some contractions K of L² (...), with applications to Markov operators. %J Mathematische Annalen %D 1995 %P 699-712 %V 303 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1995__303_4_165388/ %F MAN_1995__303_4_165388