HUNTER, David R.; GOODREAU, Steven M.; HANDCOCK, Mark S. ergm.userterms: A Template Package for Extending statnet. Journal of Statistical Software, [S. l.], v. 52, n. 2, p. 1–25, 2013. DOI: 10.18637/jss.v052.i02. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v052i02. Acesso em: 18 apr. 2025.