@article{GDZPPN002208571,
title = {On contractions of extremal rays of Fano manifolds.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {416},
year = {1991},
pages = {141-158},
zbl = {0721.14023},
url = {http://dml.mathdoc.fr/item/GDZPPN002208571}
}
Wisniewski, Jaroslaw. On contractions of extremal rays of Fano manifolds.. Journal für die reine und angewandte Mathematik, Tome 416 (1991) pp. 141-158. http://gdmltest.u-ga.fr/item/GDZPPN002208571/