MALDONADO, E. F.; FERNANDEZ, F. J. .; TRIANES, M. V. .; WESNES, K. .; PETRINI, O. .; ZANGARA, A. .; ENGUIX, A. .; AMBROSETTI, L. . Cognitive performance and morning levels of salivary cortisol and α-Amylase in children reporting high vs. low daily stress perception. The Spanish Journal of Psychology, v. 11, n. 1, p. 3–15, 28 Apr.2008.