@article{IM_1990__102_2_143832,
     author = {Steven Dale Cutkosky},
     title = {A new characterization of rational surface singularities.},
     journal = {Inventiones mathematicae},
     pages = {157--178},
     publisher = {mathdoc},
     volume = {102},
     number = {2},
     year = {1990},
     zbl = {0718.14025},
     url = {http://geodesic.mathdoc.fr/item/IM_1990__102_2_143832/}
}