Lopez-Villalobos, Jose A., et al. “Validity of a Reduced Model of Items of DSM-IV Criteria According to the parents’ and teachers’ Responses in the Diagnostic of the Attention Deficit Hyperactivity Disorder (combined Type)”. Anales De Psicología Annals of Psychology, vol. 30, no. 3, Aug. 2014, pp. 898-07, doi:10.6018/analesps.30.3.152561.