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5. Repeated failure: a source of helplessness or a factor irrelevant to its emergence? Kofta M, Sedek G. J Exp Psychol Gen; 1989 Mar; 118(1):3-12. PubMed ID: 2522505 [Abstract] [Full Text] [Related]
15. Cognitive functioning in depression: a review of theory and research. Willner P. Psychol Med; 1984 Nov; 14(4):807-23. PubMed ID: 6545415 [Abstract] [Full Text] [Related]
16. Judgment of contingency: cognitive biases in depressed and nondepressed subjects. Vázquez C. J Pers Soc Psychol; 1987 Feb; 52(2):419-31. PubMed ID: 3559899 [Abstract] [Full Text] [Related]