TY  - JOUR
AU  - Yujiro Kawamata
TI  - On the length of a extremal rational curve.
JO  - Inventiones mathematicae
PY  - 1991
SP  - 609
EP  - 612
VL  - 105
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1991__105_3_143926/
ID  - IM_1991__105_3_143926
ER  -