Giorgio, E. D., Loveland, J. L., Mayer, U., Rosa-Salva, O., Versace, E., & Vallortigara, G. (2017). Filial responses as predisposed and learned preferences: Early attachment in chicks and babies. Behavioural Brain Research, 325(Part B), 90-104. doi:10.1016/j.bbr.2016.09.018.