James P[eter] Allen (2010) Middle Egyptian: An Introduction to the Language and Culture of Hieroglyphs, 2nd edition, Cambridge: Cambridge University Press, →ISBN, pages 112, 215.
^ Loprieno, Antonio (1995) Ancient Egyptian: A Linguistic Introduction, Cambridge: Cambridge University Press, →ISBN, page 42
^ Loprieno, Antonio (2001) “From Ancient Egyptian to Coptic” in Haspelmath, Martin et al. (eds.), Language Typology and Language Universals. Loprieno cites a slightly earlier form with -/aː/-.
