Q. Abbas, K. B. Baig, Z. Ramzan, F. Emad, M. Shahzadi, and S. Ahmad, “Patterns of positive and negative symptoms in schizophrenia patients: role of patients’ perception, motivations, and socioeconomic status”, Pak J Phsyiol, vol. 16, no. 3, pp. 29–34, Sep. 2020.