DeBruine, L.M., Jones, B.C., Little, A.C., Boothroyd, L.G., Perrett, D.I., Penton-Voak, I.S., Cooper, P.A., Penke, L., Feinberg, D.R., Tiddeman, B.P., "Correlated preferences for facial masculinity and ideal or actual partner's masculinity.", Proceedings of the Royal Society B: Biological Sciences, 2006