Monteiro, S., A. Bártolo, A. Torres, A. Pereira, and E. Albuquerque. “Examining the Construct Validity of the Portuguese Version of the Patient Health Questionnaire-9 Among College Students”. PSICOLOGIA, vol. 33, no. 2, Dec. 2019, pp. 1-8, doi:10.17575/rpsicol.v33i2.1421.