Cameron, P. J. "Cyclic Automorphisms of a Countable Graph and Random Sum-Free Sets." Graphs and Combinatorics1, 129-135, 1985.Cameron, P. J. "Portrait of a Typical Sum-Free Set." 在 Surveys in Combinatorics 1987 (编. C. Whitehead). New York: Cambridge University Press, 13-42, 1987.Finch, S. R. "Cameron's Sum-Free Set Constant." §2.25 在 Mathematical Constants. Cambridge, England: Cambridge University Press, 页 180-183, 2003.