A. A. E. van der Geer, G. A. Lyras, P. Mitteroecker, and R. D. E. MacPhee. From Jumbo to Dumbo: Cranial Shape Changes in Elephants and Hippos During Phyletic Dwarfing. Evol. Biol., Springer, volume 45, issue 3, pages 303-317, September 2018.

G. A. Lyras, M. D. Dermitzakis, A. A. E. V. der Geer, S. B. V. der Geer, and J. D. Vos. The origin of Homo floresiensis and its relation to evolutionary processes under isolation. Anthropol. Sci., Anthropological Soc Nippon, volume 117, issue 1, pages 33-43, April 2009.