Small, D. A., & Loewenstein, G. (2006). Sympathy and callousness: The impact of deliberative thought on donations to identifiable and statistical victims. Elsevier. 102, 2. 143-153.
Vogel, D. R., Dickson, G. W. & Lehman, J. A. (1986). Persuasion and the Role of Visual Presentation Support: The UM/3M Study.
Kliegl, R., Smith, J., Heckhausen, J. & Baltes, P.B. (1987). Mnemonic Training for the Acquisition of Skilled Digit Memory. Cognition and Instruction. 4, 4. 203-223.