1. Arai, S., Sycara, K.: Credit assignment method for learning effective stochastic policies in uncertain domains. In: Proceedings of the 3rd Annual Conference on Genetic and Evolutionary Computation, pp. 815–822. Morgan Kaufmann Publishers Inc. (2001)
2. Chrisman, L.: Reinforcement learning with perceptual aliasing: the perceptual distinctions approach. In: AAAI, pp. 183–188 (1992)
3. Grefenstette, J.J.: Credit assignment in rule discovery systems based on genetic algorithms. Mach. Learn. 3(2–3), 225–245 (1988)
4. Kawai, H., Ueno, A., Tatsumi, S.: A reinforcement learning method using reward acquisition efficiency for pomdp environments. J. Jpn. Soc. Artif. Intell. 23(1), 1–12 (2008). (in Japanese)
5. McCallum, R.A.: Overcoming incomplete perception with utile distinction memory. In: Proceedings of the Tenth International Conference on Machine Learning, pp. 190–196 (1993)