1. Arendt, D. (2003). Evolution of eyes and photoreceptor cell types. International Journal of Developmental Biology, 47(7–8), 563–571.
2. Bouchard, M., Busslinger, M., Xu, P., De Caprona, D., & Fritzsch, B. (2010). PAX2 and PAX8 cooperate in mouse inner ear morphogenesis and innervation. BMC Developmental Biology, 10, 89.
3. Braun, C. B., & Northcutt, R. G. (1997). The lateral line system of hagfishes (Craniata: Myxinoidea). Acta Zoologica, 3, 247–268.
4. Darwin, C. (1859). On the origin of species by means of natural selection or the preservation of favoured races in the struggle for life. London: Murray.
5. de Burlet, H. M. (1934). Vergleichende Anatomie des statoakustischen Organs. a) Die innere Ohrsphäre. In L. Bolk, E. Göppert, E. Kallius & W. Lubosch (Eds.), Handbuch der Vergleichenden Anatomie der Wirbeltiere (Vol. 2, pp. 1293–1432). Berlin: Urban and Schwarzenberg.