PSL(2, 7)
Brown, Ezra; Loehr, Nicholas (2009). “Why is PSL (2,7)≅ GL (3,2)?”. Am. Math. Mon. 116 (8): 727–732. doi:10.4169/193009709X460859. Zbl 1229.20046. http://www.math.vt.edu/people/brown/doc/PSL%282,7%29_GL%283,2%29.pdf.