@article{GDZPPN00125880X, title = {A note on the comparison of C0-semigroups.}, journal = {Semigroup forum}, volume = {33}, year = {1986}, pages = {237-244}, zbl = {0618.47034}, url = {http://dml.mathdoc.fr/item/GDZPPN00125880X} }
Desch, W.; Schappacher, W. A note on the comparison of C0-semigroups.. Semigroup forum, Tome 33 (1986) pp. 237-244. http://gdmltest.u-ga.fr/item/GDZPPN00125880X/