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Sprengelmeyer, R; Perrett, D.; Fagan, E.; Cornwell, R.; Lobmaier, J.; Sprengelmeyer, A.; Aasheim, H.; Black, I.; et al. (2009). ”The Cutest Little Baby Face: A Hormonal Link to Sensitivity to Cuteness in Infant Faces”. Psychological Science 20 (9): sid. 149–154. doi:10.1111/j.1467-9280.2009.02272.x. PMID 19175530.