Rudnicki, Konrad, Aleksandra Rutkowska, and Marek Wieczorek. 2015. “Salivary Catecholamines in Examinational Stress and Cognitive Effort”. Acta Universitatis Lodziensis. Folia Psychologica, no. 19 (January):89-107. https://doi.org/10.18778/1427-969X.19.05.