1. P. J. Cameron and P. Erdös, On the Number of Sets of Integers with Various Properties, Number Theory (Banff, AB, 1988) (de Gruyter, Berlin, 1990), pp. 61–79.
2. N. Alon, “Independent Sets in Regular Graphs and Sum-Free Subsets of Abelian Groups,” Israel J. Math. 73, 247–256 (1991).
3. N. Calkin, “On the Number of Sum-Free Set,” Bull. London Math. Soc. 22, 141–144 (1990).
4. B. J. Green, “The Cameron-Erdös Conjecture,” Bull. London Math. Soc. 36, 769–778 (2004).
5. A. A. Sapozhenko, “The Cameron-Erdös Conjecture,” Dokl. Akad. Nauk 393, 749–752 (2003) [Dokl. Math. 68, 438–441 (2003)].