TY  - JOUR
AU  - Stephen S.-T. Yau
AU  - Anatoly Libgober
TI  - An obstruction for smoothing of Gorenstein surface singularities.
JO  - Commentarii mathematici Helvetici
PY  - 1990
SP  - 413
EP  - 433
VL  - 65
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140203/
ID  - CMH_1990__65_3_140203
ER  -