Kilduff, L., Crewther, B., Cook, C., & Manning, J. (2015). Digit ratio (2D: 4D) and salivary testosterone, oestradiol and cortisol levels under challenge: Evidence for prenatal effects on adult endocrine responses. Early Human Development, 91(8), pp. 451-456. doi:10.1016/j.earlhumdev.2015.04.011

Kilduff, Liam, Blair Crewther, Christian Cook, and John Manning. "Digit Ratio (2D: 4D) and Salivary Testosterone, Oestradiol and Cortisol Levels Under Challenge: Evidence for Prenatal Effects On Adult Endocrine Responses." Early Human Development 91, no. 8 (2015): 451-456.

Kilduff, Liam, Blair Crewther, Christian Cook, and John Manning. "Digit Ratio (2D: 4D) and Salivary Testosterone, Oestradiol and Cortisol Levels Under Challenge: Evidence for Prenatal Effects On Adult Endocrine Responses." Early Human Development 91.8 (2015): 451-456.