1. Relativizations of the P=?NP question;Baker;SIAM J. Comp.,1975
2. Can economic systems be seen as computing devices?;Bartholo;J. Econ. Behav. Org.,2009
3. Bartholo, R., Cosenza, C.A., Doria, F.A., Doria, M., Teixeira, A., submitted for publication. On exact and approximate solutions for hard problems in economics: an alternative approach.
4. On the independence of P vs. NP, Technical Report # 699, Technion;Ben-David,1991
5. Brunner, H.P., Allen, P., 2009. Complex systems modeling and international development, in Rosser (2009a), pp. 326–349.