@article{MAN_1980__247_163353,
     author = {Robert C. Valentini and Manohar L. Madan},
     title = {Weierstrass {Points} in {Characteristic} p.},
     journal = {Mathematische Annalen},
     pages = {123--132},
     publisher = {mathdoc},
     volume = {247},
     year = {1980},
     zbl = {0408.14008},
     url = {http://geodesic.mathdoc.fr/item/MAN_1980__247_163353/}
}