For similar, cf. M. Page-Gasser and A. B. Wiese, Ägypten: Augenblicke der Ewigkeit, Mainz, 1997, pp. 284-285, no. 193; and B. V. Bothmer et al, Egyptian Sculpture of the Late Period, The Brooklyn Museum, New York, 1960, pp. 8-9, no. 7, pls. 6-7, figs. 14-16 and pp. 78-79, no. 65, pl. 62, figs. 155-157. Also R. Bianchi, "The Egg-Heads", one type of generic portrait from the Egyptian Late Period, in Wissenschafliche Zeitschrift der Humboldt, Berlin, 31, 1983, pp. 149-151.