Calvo, Natalia, Óscar Andión, Beatriz Gancedo, Marc Ferrer, Carmen Barral, Andrea Di Genova, Rafael Torrubia, and Miguel Casas. 2012. “Borderline Personality Disorder (BPD) Diagnosis With the Self-Report Personality Diagnostic Questionnaire–4+(PDQ-4+): Confirmation of the 3-Factor Structure”. Actas Españolas De Psiquiatría 40 (2):57-62. https://actaspsiquiatria.es/index.php/actas/article/view/674.