K.S.B. Ryholt: The Political Situation in Egypt during the Second Intermediate Period, c.1800–1550 BC, Carsten Niebuhr Institute Publications, vol. 20. Copenhagen: Museum Tusculanum Press, 1997, excerpts available online here.
openlibrary.org
Flinders Petrie: Scarabs and cylinders with names, illustrated by the Egyptian collection in University College, Luân Đôn by W. M. Flinders Petrie, British school of archaeology in Egypt and Egyptian research account, Luân Đôn 1917, available online copyright-free see pl. xxii, num 16.h.1
Percy E. Newberry: Scarabs an introduction to the study of Egyptian seals and signet rings, with forty-four plates and one hundred and sixteen illustrations in the text, 1906, available online copyright-free see plate XXII, num 8, p. 151.
