1. Allison, J.D.: Birdsong and Human Speech: Common Themes and Mechanisms. Neuroscience 22, 567–631 (1999)
2. Clarke, J.A.: Morphology, Phylogenetic Taxonomy, and Systematics of Ichthyornis and Apatornis (Avialae: Ornithurae). Bulletin of the American Museum of Natural History 286, 1–179 (2004)
3. Dorsey, J.: Twitter creator Jack Dorsey illuminates the site’s founding document. LA Times. David Sarno (February 18, 2009),
http://latimesblogs.latimes.com/technology/2009/02/twitter-creator.html
(accessed May 17, 2010)
4. Eiben, A.E., Smith, J.E.: Introduction to Evolutionary Computing, 2nd edn. Springer Natural Computing Series (2007)
5. Farnell, A.: Designing Sound. MIT Press, Cambridge (2010)