; Krebs, J., & Dawkins, R. (1984). Animal signals: mind-reading and manipulation. In: Behavioural ecology, pp. 380-402, Sinauer Press; Maynard Smith, J. & Harper, D. (2003) Animal signals. Oxford University Press; Searcy, W.A. & Nowicki, S. (2010). The Evolution of Animal Communication. Princeton University Pr