Hunter, D.R., Handcock, M.S., Butts, C.T., Goodreau, S.M. and Morris, M. 2008. ergm: A Package to Fit, Simulate and Diagnose Exponential-Family Models for Networks. Journal of Statistical Software. 24, 3 (May 2008), 1–29. DOI:https://doi.org/10.18637/jss.v024.i03.