Energy landscapes, scale-free networks and Apollonian packings
  We review recent results on the topological properties of two spatial scale-free networks, the inherent structure and Apollonian networks. The similarities between these two types of network suggest an explanation for the scale-free character of the inherent structure networks. Namely, that the energy landscape can be viewed as a fractal packing of basins of attraction. 
Jonathan P.K. Doye and Claire P. Massen