Lalueza-Fox, C., Römpler, H., Caramelli, D., Stäubert, C., Catalano, G., Hughes, D. A., et al. (2007). A melanocortin 1 receptor allele suggests varying pigmentation among Neanderthals. Science, 318(5855), 1453-1455. doi:10.1126/science.1147417.