Sasahara, K. and Ikegami, T. (2003) Coevolution of Birdsong Grammar without Imitation. In ECAL03 , pages 482--490.

Sasahara, K. and Ikegami, T. (2003) Coevolution of Birdsong Grammar without Imitation. In ECAL03, pages 482--490.

2005	-	Interactions Between Learning and Evolution in Simulated Avian Communication - Vallejo,Taylor	::
		15. Sasahara, K. and Ikegami, T.: Coevolution of Birdsong Grammar without Imitation In W. Banzhaf, T. Christaller, P. Dittrich, J.T. Kim, J. Ziegler (Eds.), ECAL 2003, Advances in Artificial Life. 7th European Conference (2003) LNAI Vol. 2801.
2004	-	Song Grammars as Complex Sexual Displays - Sasahara,Ikegami	::	3
		Sasahara, K. and Ikegami, I. (2003). Coevolution of birdsong grammar without imitation. In Wolfgang, B., Thomas, C., Peter, D., Jan, T., and Jens, Z., editors, Advances in Artificial Life, 7th European Conference on Artificial Life, pages 482--490. Springer.