@article{GDZPPN002315904, title = {Concavity Theorems.}, journal = {Mathematische Annalen}, volume = {237}, year = {1978}, pages = {37-54}, zbl = {0381.14008}, url = {http://dml.mathdoc.fr/item/GDZPPN002315904} }
Sommese, Andrew John. Concavity Theorems.. Mathematische Annalen, Tome 237 (1978) pp. 37-54. http://gdmltest.u-ga.fr/item/GDZPPN002315904/