1. Threefolds with nef anticanonical bundles;Collect. Math.,1998
2. Nonnormal del Pezzo surfaces;Publ. Res. Inst. Math. Sci.,1994
3. On the classification of cubic surfaces;J. London Math. Soc. (2),1979
4. Regularization of closed positive currents and intersection theory;J. Algebraic Geom.,1992