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In studies of the networks of citations between scientific papers, Derek de Solla Price showed in 1965 that the number of links to papers—i.e., the number of citations they receive—followed a Pareto distribution or power law. Recent interest in scale-free networks started in 1999 with work by Albert-László Barabási and colleagues who mapped the topology of a portion of the Web, finding that some nodes, which they called "hubs", had many more connections than others and that the network as a whole had a power-law distribution of the number of links connecting to a node...
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