1. Aristotle. (1962). Nicomachean ethics (translated with an introduction and notes by Martin Ostwald). Indianapolis: Bobbs-Merill.
2. Foundations of social theory;Coleman,1990
3. Relative deprivation and social justice;Runicman,1972
4. An introduction to the economics of information;Stadler,1997
5. The era of violence;Thomson,1960