1. J.J. Sylvester, Chemistry and algebra. Nature 17, 284 (1878)
2. L.A. Bunimovich, D.C. Smith, B.Z. Webb, Specialization models of network growth, arXiv:1712.01788 [physics] (2017)
3. G. Gilder, Metcalfe’s Law and Legacy (Forbes ASAP, 1993), p. 158
4. S.F. Peralta, Moore’s Law, Metcalfe’s Law, and the Dot Com Bubble (2011)
5. D.P. Reed, That sneaky exponential—Beyond Metcalfe’s law to the power of community building, in Services, in XVth International Symposium on Services and Local Access (Edinburgh, 1999)