Martorell Cafranga, A., and J. L. Ayuso Mateos. “Uncertainty on the Measurement of Intelligence”. Actas Españolas de Psiquiatría 32, no. 2 (March 1, 2004): 98–106. Accessed April 3, 2026. https://actaspsiquiatria.es/index.php/actas/article/view/1158.