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Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
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M. E. J. Newman
City College of New York
Proceedings of the National Academy of Sciences
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M. E. J. Newman (Tue,) studied this question.
synapsesocial.com/papers/6a0fd4cb2badbc352afec9f5 — DOI: https://doi.org/10.1073/pnas.021544898