1. Allen, J., & Barnsley, R. (1993). Streams and tiers: The interaction of ability, maturity, and training in systems with age-dependent recursive selection. The Journal of Human Resources, 28(3), 649-659.
2. Aune, T. K., Pedersen, A. V., Ingvaldsen, R. P. & Dalen, T. (2017). Relative age effect and gender differences in physical education attainment in Norwegian school children. Scandinavian Journal of Educational Research, 61(3), 369-375,
3. Barnsley, R. H., Thompson, A. H., & Barnsley, P. E. (1985). Hockey success and birth-date: The relative age effect. Journal of the Canadian Association for Health, Physical Education and Recreation, 51, 23–28.
4. Bedard, K., and Dhuey, E. (2006). The persistence of early childhood maturity: International Evidence of Long-Run Age Effects. The Quarterly Journal of Economics, 2006, 121(4), 1437-1472.
5. Borg, M. G., & Falzon, J. M. (1995). Birth date and sex effects on the scholastic attainment of primary schoolchildren: A cross‐sectional study. British Educational Research Journal, 21(1), 61-74.