Bibliography
Gardiner, Alan Henderson (1957), Egyptian grammar being an introduction to the study of hieroglyphs, 3rd, revised edition, page 459
Roberson, J.A. (2020), Enigmatic writing in the Egyptian New Kingdom II: a lexicon of ancient Egyptian cryptography of the New Kingdom. With contributions by David Klotz. Zeitschrift für ägyptische Sprache und Altertumskunde - Beihefte 12 (2), p. 69, direct (antonomasia, Anubis = "master of secrets")