Aguado, Luis, Ana Garcia-gutierrez, Ester Castañeda, and Cristina Saugar. “Effects of prime Task on Affective Priming By Facial Expressions of Emotion”. The Spanish Journal of Psychology, vol. 10, vol. 10, no. 2, 2007, pp. 209-17, https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0707220209A.