[1] M. Nowak, D. Krakauer, Proc. Natl. Acad. Sci. USA 96 (1999) 8028.

[2] D. Abrams, S. Strogatz, Nature 424 (2003) 900.

[3] C. Schulze, D. Stauffer, Int. J. Mod. Phys. C 16 (2005) 718 AIP Conference proceedings 119 (2005) 49 (8th Granada Seminar).

[4] C. Schulze, D. Stauffer, Phys. Life Rev. 2 (2005) 89.

[5] C. Schulze, D. Stauffer, Adv. Complex Syst. 9 (2006) 183.

[6] K. Kosmidis, J.M. Halley, P. Argyrakis, Physica A 353 (2005) 595.

[7] K. Kosmidis, A. Kalampokis, P. Argyrakis, Physica A 366 (2006) 495.

[8] A. Baronchelli, et al., J. Stat. Mech. (2006) P06014, arXiv:physics/0601114.

[9] K. Kosmidis, A. Kalampokis, P. Argyrakis, Physica A 370 (2006) 808.

[10] V. Schwa¨ mmle, Int. J. Mod. Phys. C 16 (2005) 1519.

[11] V. Schwa¨ mmle, Int. J. Mod. Phys. C 17 (2006) 103.

[12] T. Tes-ileanu, H. Meyer-Ortmanns, Int. J. Mod. Phys. C 17 (2006) 256.

[13] M. Patriarca, T. Leppa¨ nnen, Physica A 338 (2004) 296.

[14] J. Mira, A. Paredes, Europhys. Lett. 69 (2005) 1031-1034.

[15] J.P. Pinasco, L. Romanelli, Physica A 361 (2006) 355-360.

[16] V.M. de Oliveira, et al., Physica A 361 (2006) 361.

[17] V.M. de Oliveira, et al., Physica A 368 (2006) 257.

[18] S. Havlin, Physica A 216 (1995) 148.

[19] R. Cancho, R. Sole, Proc. Natl. Acad. Sci. USA 100 (2003) 788.

[20] G.J. Baxter, et al., Phys. Rev. E 73 (2006) 046118.

[21] S. Wichmann, et al.,Trans. Philological Soc. (2007), in press.

[22] D. Stauffer, S.M. de Oliveira, P.M.C. de Oliveira, J.S. Sa Martins, Biology, Sociology, Geology by Computational Physicists, Elsevier, Amsterdam, 2006.

[23] M. Droz, A. Pe ̧kalski, Physica A 362 (2006) 504.

[24] T.J.P. Penna, et al., Phys. Rev. E 52 (1995) 3309.

[25] L.K. Gallos, Int. J. Mod. Phys. C 16 (2005) 1329.

[26] R.N. Mantegna, H.E. Stanley, Turbulence and financial markets, Nature 383 (1996) 587-588.

[27] L.A.N. Amaral, et al., Proc. Natl. Acad. Sci. 97 (2000) 11149.

[28] M.E.J. Newman, D.J. Watts, S.H. Strogatz, Proc. Natl. Acad. Sci. 99 (2002) 2566.

[29] F. Liljeros, et al., Nature 411 (2001) 907.

[30] A.-L. Baraba´ si, R. Albert, Science 286 (1999) 509.

[31] R. Albert, H. Jeong, A.-L. Baraba´ si, Nature (London) 401 (1999) 130.

[32] M.E.J. Newman, Phys. Rev. E 66 (2002) 016128.

[33] R. Cohen, et al., Phys. Rev. Lett. 85 (2000) 4626.

[34] R. Toivonen, et al., arXiv:physics/0601114.

[35] A. Kalampokis, K. Kosmidis, P. Argyrakis, Study of language evolution and population dynamics of two interacting species on scale free and random networks, ECCS '06, Oxford.