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Keller, P. ., El-Sheikh, M. ., & Buckhalt, J. . (2008). Children’s attachment to parents and their academic functioning: sleep disruptions as moderators of effects. Journal of Developmental and Behavioral Pediatrics : JDBP, 29(6), 441-9. https://doi.org/10.1097/DBP.0b013e318182a9b4

El-Sheikh, M. ., Buckhalt, J. ., Keller, P. ., & Granger, D. . (2008). Children’s objective and subjective sleep disruptions: links with afternoon cortisol levels. Health Psychology : Official Journal of the Division of Health Psychology, American Psychological Association, 27(1), 26-33. https://doi.org/10.1037/0278-6133.27.1.26

El-Sheikh, M. ., Buckhalt, J. ., Keller, P. ., Cummings, E. ., & Acebo, C. . (2007). Child emotional insecurity and academic achievement: the role of sleep disruptions. Journal of Family Psychology : JFP : Journal of the Division of Family Psychology of the American Psychological Association (Division 43), 21(1), 29-38. https://doi.org/10.1037/0893-3200.21.1.29

Keller, P. ., El-Sheikh, M. ., Granger, D. ., & Buckhalt, J. . (1969). Interactions between salivary cortisol and alpha-amylase as predictors of children’s cognitive functioning and academic performance. Physiology & Behavior, 105(4), 987-95. https://doi.org/10.1016/j.physbeh.2011.11.005 (Original work published)

Keller, P. ., El-Sheikh, M. ., Granger, D. ., & Buckhalt, J. . (2012). Interactions between salivary cortisol and alpha-amylase as predictors of children’s cognitive functioning and academic performance. Physiology & Behavior, 105(4), 987-95. https://doi.org/10.1016/j.physbeh.2011.11.005 (Original work published 2012)