Greives, T., Eshleman, M., Galante, H., Elderbrock, E., Deimel, C., & Hau, M. (2021). Early nighttime testosterone peaks are correlated with GnRH-induced testosterone in a diurnal songbird. General and Comparative Endocrinology, 312: 113861. doi:10.1016/j.ygcen.2021.113861.