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References

  • 1
    Bradbury, J.W. & Vehrenkamp, S.L. 1998. Principles of Animal Communication. Sinauer, Sunderland.
  • 2
    Hauser, M.D. 1996. The Evolution of Communication. MIT Press, Cambridge.
  • 3
    Hopp, S.L., Owren, M.J., Evans, C.S., eds. 1998. Animal acoustic communication. Sound Analysis and Research Methods. Springer, Berlin.
  • 4
    Snowdon, C.T. & Hausberger, M., eds. 1997. Social Influences on Vocal Development. Cambridge University Press, Cambridge.