Walter Feit and Graham Higman (1964), The nonexistence of certain generalized polygons., J. Algebra, 1: 114–131
Graham Higman (1966) Odd characterisations of finite simple groups, U. of Michigan Press
*Graham Higman (1974), Finitely presented infinite simple groups, Notes on Pure Mathematics, vol.8, Department of Pure Mathematics, Department of Mathematics, I.A.S. Australian National University, Canberra, ISBN978-0-7081-0300-5, MR0376874, diarsipkan dari asli tanggal 2023-08-08, diakses tanggal 2019-04-24
Graham Higman and Elizabeth Scott (1988), Existentially closed groups, LMS Monographs, Clarendon Press, Oxford[1]
