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.
Janine Bourriau, Ian Shaw (editor): The Oxford history of ancient Egypt, chapter The Second Intermediate Period, Oxford University Press, Oxford 2003, ISBN0-19-280458-8, [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 XXIII, num 10 and page 152.
