FREEMAN, E. A.; MOISEN, G. PresenceAbsence: An R Package for Presence Absence Analysis. Journal of Statistical Software, [S. l.], v. 23, n. 11, p. 1–31, 2008. DOI: 10.18637/jss.v023.i11. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v023i11. Acesso em: 29 mar. 2024.