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		| Paper: | 
		Theoretical Problems and Perspectives | 
	 
	
		| Volume: | 
		421, Galaxies in Isolation: Exploring Nature Versus Nurture | 
	 
	
		| Page: | 
		233 | 
	 
	
		| Authors: | 
		Combes, F. | 
	 
	
	
		| Abstract: | 
		This talk tries to summarise where we are now, in the “nature and nurture” questions in galaxy formation and evolution, and briefly describe unsolved problems, and perspectives of progress. | 
	 
	
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