@article{MAN_1994__300_2_165274,
     author = {Marco Andreatta},
     title = {Contractions of {Gorenstein} polarized varieties with high nef value.},
     journal = {Mathematische Annalen},
     pages = {669--680},
     publisher = {mathdoc},
     volume = {300},
     number = {2},
     year = {1994},
     zbl = {0813.14009},
     url = {http://geodesic.mathdoc.fr/item/MAN_1994__300_2_165274/}
}