Law Smith, Miriam J.; Deady, Denis K.; Moore, Fhionna R.; Jones, Benedict C.; Cornwell, R. Elisabeth; Stirrat, Michael; Lawson, Jamie F.; Feinberg, David R.; Perrett, David I. (2011-09-21). "Maternal tendencies in women are associated with estrogen levels and facial femininity". Hormones and Behavior. 61 (1): 12–6. doi:10.1016/j.yhbeh.2011.09.005. PMID21983237. S2CID23542024.
Law Smith, Miriam J.; Deady, Denis K.; Moore, Fhionna R.; Jones, Benedict C.; Cornwell, R. Elisabeth; Stirrat, Michael; Lawson, Jamie F.; Feinberg, David R.; Perrett, David I. (2011-09-21). "Maternal tendencies in women are associated with estrogen levels and facial femininity". Hormones and Behavior. 61 (1): 12–6. doi:10.1016/j.yhbeh.2011.09.005. PMID21983237. S2CID23542024.
Law Smith, Miriam J.; Deady, Denis K.; Moore, Fhionna R.; Jones, Benedict C.; Cornwell, R. Elisabeth; Stirrat, Michael; Lawson, Jamie F.; Feinberg, David R.; Perrett, David I. (2011-09-21). "Maternal tendencies in women are associated with estrogen levels and facial femininity". Hormones and Behavior. 61 (1): 12–6. doi:10.1016/j.yhbeh.2011.09.005. PMID21983237. S2CID23542024.