Edqvist, PHD, et al. “Early Identification of Retinal Subtypes in the Developing, Pre-Laminated Chick Retina Using the Transcription Factors Prox1, Lim1, Ap2a, Pax6, Isl1, Isl2, Lim3 and Chx10”. European Journal of Histochemistry, vol. 50, no. 2, June 2009, pp. 147-54, doi:10.4081/987.