%0 Journal Article %A Leonid V. Kovalev %T A geometric approach to accretivity %J Studia Mathematica %D 2007 %P 87-100 %V 181 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm181-1-6/ %R 10.4064/sm181-1-6 %G en %F 10_4064_sm181_1_6