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[3] C¸. Tuncay, Physics of randomness and regularities for cities, languages, and their lifetimes and family trees, to be published in Int. J. Mod. Phys. C 18, (2007), e-print 0705.1838 on arXiv.org

[4] URL: http://linkage.rockefeller.edu/wli/zipf/; http://linkage.rockefeller.edu/wli/zipf/index ru.html; http://www.nslij-genetics.org/wli/zipf/index.html; http://www.un.org/esa/population/publications/WPP2004/2004Highlights finalrevised.pdf

[5] B.F. Grimes, Ethnologue: Languages of the World (14th edn. 2000). Dallas, TX: Summer Institute of Linguistics. S. Wichmann, J. Linguistics 41, 117 (2005). D. Zanette, Adv. Complex Syst. 4: 281 (2001).

[6] URL: http://www.citypopulation.de/cities.html (For other useful sites: http://www.prb.org/; http://www.refdesk.com/factpop.html; http://www.census.gov/ipc/www/popclockworld.html

[7] J. Mira, J., A. Paredes, Europhys. Lett. 69 (2005) 1031. 27. K. Kosmidis, J.M. Halley, P. Argyrakis, Physica A, 353 (2005) 595. K. Kosmidis, A. Kalampokis, P. Argyrakis, Physica A 366, 495 and 370, 808 (2006). X.

[8] W.J. Sutherland, Nature 423 (2003) 276.

[9] P.M.C. de Oliveira et al. arXiv:0709.0868, submitted to J. Linguistics.

[10] C¸. Tuncay, A physical model for competition between biological speciation and extinction, arXiv:q-bio.PE/0702040, submitted to J. Theo. Bio.