He has a few papers published.
This link has many links and is particularly good for children’s advantages.
https://www.ultraphysical.us/p/beyond-t-sex-based-differences-in
Gregory Brown, Professor Exercise Science (primarily Exercise Physiology) at the University of Nebraska at Kearney.
and part of this
https://onlinelibrary.wiley.com/doi/epdf/10.1111/sms.14581
The International Olympic Committee framework on fairness, inclusion and nondiscrimination on the basis of gender identity and sex variations does not protect fairness for female athletes
Tommy R. Lundberg, Ross Tucker, Kerry McGawley, Alun G. Williams, Grégoire P. Millet, Øyvind Sandbakk, Glyn Howatson, Gregory A. Brown, Lara A. Carlson, Sarah Chantler, Mark A. Chen, Shane M. Heffernan, Neil Heron, Christopher Kirk, Marie H. Murphy, Noel Pollock, Jamie Pringle, Andrew Richardson, Jordan Santos-Concejero, Georgina K. Stebbings, Ask Vest Christiansen, Stuart M. Phillips, Cathy Devine, Carwyn Jones, Jon Pike, Emma N. Hilton
Perspectives:
The IOC framework on fairness, inclusion and nondiscrimination on the basis of gender identity and sex variations is misaligned with current scientific and medical evidence and offers insufficient protection of fair competition for female athletes within a female category. Also, it does not adequately engage female athletes, who are primary stakeholders in their sport. Male pubertal development results in large performance advantages in athletic sports, which necessitates a female category that excludes male advantages, to ensure equal opportunity through fair competition for female athletes at all levels of sport. There is currently no evidence that testosterone suppression in transgender women can reverse male development and negate male advantages. In contrast, there is convincing evidence that the male advantage persists even when testosterone is suppressed. As a result, sports face the uncomfortable reality that the inclusion of transgender women in female sports categories cannot be reconciled with fairness, and in some instances safety, for females in athletic sports. The IOC must reconsider its framework and revise the 10 principles to reflect scientific evidence and fundamental principles of fair competition. We also recommend implementing a system to enable female stakeholders to be consulted in this matter and to have their voices heard, recognized, and valued.
and there is this
Sex-based differences in track running distances of 100, 200, 400, 800, and 1500m in the 8 and under and 9–10-year-old age groups
Gregory A Brown, Brandon S Shaw, Ina Shaw
5th February 2024
https://onlinelibrary.wiley.com/doi/10.1002/ejsc.12075
"In conclusion, although some have stated that sex-based differences in athletic performance do not arise until puberty, the present data indicate that in the 8 and under and 9–10-year-old age groups males run faster than females in distances of 100, 200, 400, 800, and 1500m. While some females in these age groups are faster than some males, the average male finalists are faster than the average female finalists, and the fastest males are faster than the fastest females. As running is a key component of many sports, these sex-based differences between prepubertal males and females should be considered when sport governing bodies and policy makers consider the issue of sex-based sporting categories"