Sánchez-navarro, Juan Pedro, José María Martínez-selva, Francisco Román, y Ginesa Torrente. «The Effect of Content and Physical Properties of Affective Pictures on Emotional Responses». The Spanish Journal of Psychology, vol. 9, vol. 9, n.º 2, 2006, pp. 145-53, https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0606220145A.