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References[edit | edit source]
- Clare, M. S., & Grote, N. K. (1998). Why aren't indices of relationship costs always negatively related to indices of relationship quality? Personality and Social Psychology Review, 2, 2-17.
- Hays, R. B. (1985). A longitudinal study of friendship development. Journal of Personality. and Social Psychology, 48, 909-924.