This week's issue of http://pnas.org has a special section on complexity:
In this issue, all of the articles address problems of complexity in organisms. Topics range from information processing in their signaling network and the organization of their metabolism, to how populations of differentiated cells communicate with one another to coordinate behavior, and to how evolution has arrived at different recurrent motifs of control and linked together different physiological functions. You usually need a subscription to get the full text of articles that aren't marked Open Access, but the first two articles I pinged came up without asking for a login. -- rec --
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