@article{GDZPPN002327503, title = {A Comparison Theorem.}, journal = {Mathematische Annalen}, volume = {270}, year = {1985}, pages = {271-276}, zbl = {0562.14002}, url = {http://dml.mathdoc.fr/item/GDZPPN002327503} }
Okonek, Christian. A Comparison Theorem.. Mathematische Annalen, Tome 270 (1985) pp. 271-276. http://gdmltest.u-ga.fr/item/GDZPPN002327503/