@article{GDZPPN002431009, title = {Weak Kato-Inequalities and Positive Semigroups.}, journal = {Mathematische Zeitschrift}, volume = {189}, year = {1985}, pages = {305-314}, zbl = {0609.47050}, url = {http://dml.mathdoc.fr/item/GDZPPN002431009} }
Schep, Anton R. Weak Kato-Inequalities and Positive Semigroups.. Mathematische Zeitschrift, Tome 189 (1985) pp. 305-314. http://gdmltest.u-ga.fr/item/GDZPPN002431009/