@article{GDZPPN002101912,
title = {On extremal rays of the higher dimensional varieties.},
journal = {Inventiones mathematicae},
volume = {82},
year = {1985},
pages = {347-358},
zbl = {0554.14001},
url = {http://dml.mathdoc.fr/item/GDZPPN002101912}
}
Ando, Tetsuya. On extremal rays of the higher dimensional varieties.. Inventiones mathematicae, Tome 82 (1985) pp. 347-358. http://gdmltest.u-ga.fr/item/GDZPPN002101912/