Scientific collaboration networks. I. Network construction and fundamental results.

By Mark Newman. Physical review. E, Statistical, nonlinear, and soft matter physics, 2001

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Economics: An Emerging Small World (2004, methodology): “In mapping the data onto the network, we distinguish different authors by their last name and the initials of all their first names.2 About 1.6 2 We borrow this procedure from Newman (2001).”
Bipartite Graphs as Models of Complex Networks (2003, background): “…actors are linked when they have played together [24, 70] ; a co-authoring graph from Arxiv [7] where scientists are linked if they have signed a paper together [50, 51, 56]; and ﬁnally a protein graph where two proteins of a given biological system are linked if they inﬂuence each other [23, 35].”
Statistical mechanics of complex networks (2001, methodology): “To uncover the topology of this complex graph, Newman (2001a, 2001b, 2001c) studied four databases spanning physics, biomedical research, high-energy physics, and computer science over a five-year window (1995–1999).”