1. S. S. Abhyankar, Galois embeddings for linear groups,Trans. Amer. Math. Soc. 352 (2000), 3881–3912.
2. J. Buller and Z. Reichstein, On the essential dimension of a finite group, Compositio Mathematica 106 (1997), 159–179.
3. B. Huppert, “Endliche Gruppen I,” Grundlehren der mathematischen Wissenschaften, 134. Springer-Verlag, 1967.
4. C. U. Jensen, A. Ledet and N. Yui, “Generic Polynomials,” MSRI Publications, 45. Cambridge University Press, 2002.
5. A. Ledet, On p-group in characteristic p, preprint, 2001.