D. Danks (2003), Equilibria of the Rescorla-Wagner model. Journal of
Mathematical Psychology 47, 109-121.
B. A. Spellman, (1996). Conditionalizing causality. In Shanks, D. R., Holyoak,
K. J., & Medin, D. L. (Eds.), Causal learning: the psychology of learning and
motivation, Vol. 34 (pp. 167-206). San Diego, CA: Academic Press.