Gutteling, B. M., de Weerth, C., & Buitelaar, J. K. (2005). Prenatal stress and children's cortisol reaction to the first day of school. Psychoneuroendocrinology, 30(6), 541-549.
Turner‐Cobb, J. M., Rixon, L., & Jessop, D. S. (2008). A prospective study of diurnal cortisol responses to the social experience of school transition in four‐year‐old children: Anticipation, exposure, and adaptation. Developmental Psychobiology: The Journal of the International Society for Developmental Psychobiology, 50(4), 377-389.
Hofferth, S. L., & Sandberg, J. F. (2001). How American children spend their time. Journal of Marriage and Family, 63(2), 295-308.