Reference

Miguel Salinas-Saavedra, Cristian Gonzalez-Cabrera, Luis Ossa-Fuentes, Joao F. Botelho, Macarena Ruiz-Flores, Alexander O. Vargas (2014): New developmental evidence supports a homeotic frameshift of digit identity in the evolution of the bird wing – Frontiers in Zoology – 2014: 0001-33-0010.