1. The abstract groups Rm = Sm = (RjSj) pj = 1, Sm = T2 = (SjT) 2pj, Sm = T2 = (S−jTSjT) pj = 1;Coxeter,1936
2. A set of generators and relations for the group PSL (2, q), q odd;Beetham;J. London Math. Soc.,1971
3. Finite Groups;Gorenstein,1968
4. Group Theory;Schenkman,1965
5. Group Theory;Scott,1964