1. Nice equations for nice groups;Abhyankar, Shreeram S.;Israel J. Math.,1994
2. Projective polynomials;Abhyankar, Shreeram S.;Proc. Amer. Math. Soc.,1997
3. [Ab3] S. S. Abhyankar, Galois theory of semilinear transformations, London Math. Soc. Lecture Note Ser., 256, Cambridge Univ. Press, Cambridge, 1999.
4. Untersuchungen über reinverzweigte Erweiterungen diskret bewerteter perfekter Körper;Arf, Cahit;J. Reine Angew. Math.,1939
5. [Car] R. W. Carter, Simple Groups of Lie Type, Wiley, 1977.