@article{MZ_1992__210_1_174425,
     author = {Marko Roczen},
     title = {Recognition of simple singularities in positive characteristic.},
     journal = {Mathematische Zeitschrift},
     pages = {641--654},
     publisher = {mathdoc},
     volume = {210},
     number = {1},
     year = {1992},
     zbl = {0774.14002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174425/}
}