(those market with * are not cited but deserves a careful look).

* Allaway, H. C., Bloski, T. G., Pierson, R. A. & Lujan, M. E. 2009. Digit ratios (2D: 4D) determined by computer‐assisted analysis are more reliable than those using physical measurements, photocopies, and printed scans. American Journal of Human Biology, 21, 365-370.

* Alter, A. L., Oppenheimer, D. M., Epley, N. & Eyre, R. N. 2007. Overcoming intuition: Metacognitive difficulty activates analytic reasoning. Journal of Experimental Psychology: General, 136, 569-576.

Auger J., Le Denmat D., Berges R., Doridot L., Salmon B., Canivenc-Lavier M.C. & Eustache F. 2013. Environmental levels of oestrogenic and antiandrogenic compounds feminize digit ratios in male rats and their unexposed male progeny. Proceedings of the Royal Society of London B, 280, 20131532.

* Austin, E. J., Manning, J. T., McInroy, K. & Mathews, E. 2002. A preliminary investigation of the associations between personality, cognitive ability and digit ratio. Personality and Individual Differences, 33, 1115–1124.

Bailey, A. A. & Hurd, P.L. 2005. Finger length ratio (2D:4D) correlates with physical aggression in men but not in women. Biological Sciences 68, 215-222.

* Baron-Cohen, S., Knickmeyer, R. & Belmonte, M. K. 2005. Sex differences in the brain: implications for explaining autism. Science, 310, 819-823.

* Baron-Cohen, S., Lutchmaya, S. & Knickmeyer, R. 2004. Prenatal testosterone in mind: studies of amniotic fluid. Cambridge, Massachusetts: MIT Press/Bradford Books.

* Berenbaum, S. A., Bryk, K. K., Nowak, N., Quigley, C. A. & Moffat, S. 2009. Fingers as a marker of prenatal androgen exposure. Endocrinology, 150, 5119–5124.

* Bernheim, B. D. & Rangel, A. 2004. Addiction and cue-triggered decision processes. American Economic Review, 94, 1558-1590.

Brañas-Garza, P. & Rustichini, A. 2011. Organizing effects of testosterone and economic behavior: not just risk taking. PLoS ONE 6, e29842.

* Brocas, I. & Carrillo, J. D. 2008. The brain as a hierarchical organization. American Economic Review, 98, 1312-1346.

* Brookes, H., Neave, N., Hamilton, C. & Fink, B. 2007. Digit ratio (2D:4D) and lateralization for basic numerical quantification. Journal of Individual Differences, 28, 55-63.

* Brosnan, M. J. 2008. Digit ratio as an indicator of numeracy relative to literacy in 7-year-old British school children. British Journal of Psychology, 99, 75-85.

* Brosnan, M., Gallop, V., Iftikhar, N. & Keogh, E. 2011. Digit ratio (2D: 4D), academic performance in computer science and computer-related anxiety. Personality and Individual Differences, 51, 371-375.

* Bull, R. & Benson, P. J. 2006. Digit ratio (2D:4D) and the spatial representation of magnitude. Hormones and Behavior, 50, 194-199.

* Camerer, C., Loewenstein, G. & Prelec, D. 2005. Neuroeconomics: how neuroscience can inform economics. Journal of Economic Literature, 43, 9-64.

* Campitelli, G. & Labollita, M. 2010. Correlations of cognitive reflection with judgments and choices. Judgment and Decision Making, 5, 182-191

* Coates, J. 2012. The hour between dog and wolf. Risk taking, gut feelings, and the biology of boom and bust. New York: Penguin Press USA.

Coates, J. M., Gurnell, M. & Rustichini, A. 2009. Second-and fourth digit ratio predicts success among higher frequency financial traders. Proceedings of the National Academy of Science of the USA, 106, 623-628.

Coyne, S. M., Manning, J. T., Ringer, L. & Bailey, L. 2007. Directional asymmetry in digit ratio (2D:4D) predict indirect aggression in women. Personality and Individual Differences, 43, 865-872.

* Elton, A., Tripathi, S. P., Mletzko, T., Young, J., Cisler, J. M., James, G. A. & Kilts, C. D. 2013. Childhood maltreatment is associated with a sex‐dependent functional reorganization of a brain inhibitory control network. Human Brain Mapping, doi: 10.1002/hbm.22280.

* Finegan, J., Niccols, G.A., Sitarenios, G. 1992. Relations between prenatal testosterone levels and cognitive abilities at 4 years. Developmental Psychology, 28, 1075–1089.

* Fink, B., Brookes, H., Neave, N., Manning, J.T., Geary, D.C. 2006. Second to fourth digit ratio and numerical competence in children. Brain and Cognition, 61, 211–218.

Garbarino, E., Slonim, R. & Sydnor, J. 2011. Digit ratios (2D:4D) as predictors of risky decision making for both sexes. Journal of Risk and Uncertainty, 42, 1–26.

* Grimshaw, G. M. 1995. Relations between prenatal testosterone and cerebral lateralization in children. Neuropsychology, 9, 74–75.

Hanoch, Y., Gummerum, M. & Rolison, J. 2012. Second-to-fourth digit ratio and Impulsivity: a comparison between offenders and non-offenders. PLoS ONE, 7(10), e47140.

Hampson, E., Ellis, C. L. & Tenk, C. M. 2008. On the relation between 2D:4D and sex-dimorphic personality traits. Archives of Sexual Behavior, 37, 133-144.

* Kempel, P., Gohlke, B., Klempau, J., Zinsberger, P., Reuter, M. and Hennig, J. 2005. Second-to-fourth digit length, testosterone and spatial ability. Intelligence, 33, 215–230.

* Kemper, C. J. & Schwerdtfeger, A. 2009. Comparing indirect methods of digit ratio (2D: 4D) measurement. American Journal of Human Biology, 21, 188-191.

Manning, J. T. 2002. Digit ratio: a pointer to fertility, behavior, and health. New Jersey: Rutgers University Press.

* Manning, J. T., Baron‐Cohen, S., Wheelwright, S. & Sanders, G. 2001. The 2nd to 4th digit ratio and autism. Developmental Medicine & Child Neurology, 43, 160-164.

* Manning, J. T., Churchill, A. J. G. & Peters, M. 2007. The effects of sex, ethnicity, and sexual orientation on self-measured digit ratio (2D:4D). Archives of Sexual Behavior, 36, 223–233.

Manning, J. T., Kilduff, L. P. & Trivers, R. 2013. Digit ratio (2D:4D) in Klinefelter's syndrome. Andrology, 1, 94-99.

Manning, J. T., Scutt, D., Wilson, J. & Lewis-Jones, D. I. 1998. The ratio of 2nd to 4th digit length: a predictor of sperm numbers and levels of testosterone, LH and oestrogen. Human Reproduction, 13, 3000-3004.

McIntyre, M. H., Ellison P. T., Lieberman D. E., Demerath, E., & Towne, B. 2005. The development of sex differences in digitalformula from infancy in the Fels Longitudinal Study. Proceedings of the Royal Society of London B, 272, 1473-1479.

* Millet, K. 2009. Low second-to-fourth-digit ratio might predict success among high-frequency financial traders because of a higher need for achievement. Proceedings of the National Academy of Sciences of the USA, 106, 623-628.

Pearson M., & Schipper, B. 2013. Menstrual Cycle and Competitive Bidding, Games and Economic Behavior, 78, 1-20

Pearson M., & Schipper, B. 2012. The Visible Hand: Finger Ratio (2D:4D) and Competitive Bidding, Experimental Economics 15 (2012), 510-529.

* Phelps, V. R. 1952. Relative index finger length as a sex-influenced trait in man. American Journal of Human Genetics, 4, 72–89.

Poulin, M., O’Connell, R. L. & Freeman, L. M. 2004. Picture recall skills correlate with 2D:4D ratio in women but not men. Evolution and Human Behavior, 25, 174-181.

* Romano, M., Leoni, B. & Saino, N. 2006. Examination marks of male university students positively correlate with finger length ratios (2D/4D). Biological Psychology, 7, 175–182.

Sapienza, P., Zingales, L. & Maestripieri, D. 2009. Gender differences in financial risk aversion and career choices are affected by testosterone. Proceedings of the National Academy of Sciences of the USA, 106, 15268–15273.

* Sluming, V. A. & Manning, J. T. 2000. Second to fourth digit ratio in elite musicians: Evidence for musical ability as an honest signal of male fitness. Evolution and Human Behavior, 21, 1-9.

Stenstrom, E., Saad, G., Nepomuceno M. V. & Mendenhall, Z. 2011. Testosterone and domain-specific risk: Digit ratios (2D:4D and rel2) as predictors of recreational, financial, and social risk-taking behaviors. Personality and Individual Differences, 51, 412-416.

Trivers, R., Manning, J. & Jacobson A. 2006. A longitudinal study of digit ratio (2D:4D) and other finger ratios in Jamaican children, Hormones and Behavior, 49, 150-156.

* Valla, J. & Ceci, S. J. 2011. Can Sex Differences in Science Be Tied to the Long Reach of Prenatal Hormones? Brain Organization Theory, Digit Ratio (2D/4D), and Sex Differences in Preferences and Cognition. Perspectives on Psychological Science, 6, 134-136.

* Voracek, M., Tran, U. S. & Dressler, S. G. 2010. Digit ratio (2D: 4D) and sensation seeking: new data and meta-analysis. Personality and Individual Differences, 48, 72-77.

* Wallen, K. 2009. Does finger fat produce sex differences in second to fourth digit ratios? Endocrinology, 150, 4819-4822.

* Williams, J. H. G., Greenhalgh, K. D. & Manning, J. T. 2003. Second to fourth finger ratio and developmental psychopathology in preschool children. Early Human Development, 72, 57-65.

Zheng, Z. & Cohn, M. J. 2011. Developmental basis of sexually dimorphic digit ratios. Proceedings of the National Academy of Sciences of the USA, 108, 16289-16294.