Lutz, B., Lu, H. C., Eichele, G., Miller, D., & Kaufman, T. C. (1996). Rescue of Drosophila labial null mutant by the chicken ortholog Hoxb-1 demonstrates that the function of Hox genes is phylogenetically conserved. Genes and Development, 10(2), 176-184. doi:10.1101/gad.10.2.176.