Emergent self-organized complex network topology out of stability   constraints
  Although most networks in nature exhibit complex topology the origins of such complexity remains unclear. We introduce a model of a growing network of interacting agents in which each new agent's membership to the network is determined by the agent's effect on the network's global stability. It is shown that out of this stability constraint, scale free networks emerges in a self organized manner, offering an explanation for the ubiquity of complex topological properties observed in biological networks. 
J. I. Perotti, O. V. Billoni, F. A. Tamarit, D. R. Chialvo and S. A.   Cannas