Saeidi, Zahra, and Behrooz Birashk. 2019. “Investigating the Effectiveness of Positivism Group Psychotherapy in Life Expectancy and Psychological Well-Being of Cancer Patients”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 44 (2): 94-110. https://gssrr.org/JournalOfBasicAndApplied/article/view/9691.