Barabási, A.-L.Jeong, H.Tu, Y.Yook, S. H.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1877910.17877/DE290R-1542enThe American Physical SocietyPhysical Review Letters53010.1103/PhysRevLett.86.5835article (journal)