[1] I. Andrus, Periodic Table of Finite Simple Groups, (2012), Available at: https://www.linkedin.com/pulse/periodic-table-finite-simple-groups-keith-raskin.
[2] G. Birkhoff, Galois and Group Theory, Osiris, 3 (1937) 260–268.
[3] J. E. Burns, The foundation period in the history of group theory, Amer. Math. Monthly, 20 (1913) 141–148.
[4] A. Cayley, On the theory of groups, as depending on the symbolic equation θn= 1, Phil. Mag., 7 (1854) 40–47, and in The Collected Mathematical Papers of Arthur Cayley, 2 Cambridge University Press, Cambridge, 1889 123–130.
[5] B. H. Ulrich, E. Bettina and E. A. O’Brien, A millennium project: constructing small groups, Internat. J. Algebra Comput., 12 (2002) 623–644.
[6] R. Elwes, An enormous theorem: the classification of finite simple groups, Plus Magazine, Issue 41, 2006.
[7] J.L.LagrangeRéflexionssurlarésolutionalgébriquedeséquationsJ.- A.Serret(Ed.),NouveauxMémoiresdel’Académie Royale des Sciences et Belles-Lettres de Berlin, années 1770 et 1771, Oeuvres de Lagrange, 3, Gauthier-Villars, Paris (1770) 205-421.
[8] I. Kleiner, The evolution of group theory: a brief survey, Math. Magazine, 6 (1986) 195–215.
[9] J. Miller, Images of Mathematicians on Postage Stamps, 2007, http://jeff560.tripod.com/.
[10] R. Roth, A history of Lagrange’s theorem on groups, Math. Magazine, 74 (2001) 99–108.
[11] I. Stewart, Why Beauty Is Truth, A History of Symmetry, Basic Books, New York, 2007.