1. Ashby, Gregory, Ann Turken, and Alice Isen. “A Neuropsychological Theory of Positive Affect and Its Influences on Cognition.” Psychokgical Review 106 (1999): 526-550.
2. Balcombe, Jonathan. The Pleasurable Kingdom: Animais and the Nature of Feeling Good. New York: Macmillan, 2006.
3. Barash, David, and Nanelle Barash. Madame Bovary s Ovaries: A Darwinian Look at Literature. New York: Bantam Dell, 2005.
4. Bellamy, Edward. Looking Backward 2000-1887. 1888. Ed. John L. Thomas. Cambridge, MA: Belknap-Harvard UP, 1967.
5. Brown, Joshua, andTodd Braver. “Learned Predictions of Error Likelihood in the Anterior Cingulate Cortex.” Science 307 (2005): 1118-1121.