@article{MAN_1978__235_163143,
     author = {Andrew John. Sommese},
     title = {Concavity {Theorems.}},
     journal = {Mathematische Annalen},
     pages = {37--54},
     publisher = {mathdoc},
     volume = {235},
     year = {1978},
     zbl = {0381.14008},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__235_163143/}
}