Coptic Orthodox Church of Alexandria [online]. Encyclopædia Britannica Online [cit. 2010-01-21]. Dostupné online. (anglicky)
web.archive.org
The Issue between monophysitism and Dyophysitism [online]. Nine Saints Ethiopian Orthodox Monastery [cit. 2010-01-21]. Dostupné v archivu pořízeném dne 2011-01-26. (anglicky)
