1. Bellman, R.E.: Dynamic Programming. Princeton University Press, Princeton (1957)
2. Bellman, R.E.: Dynamic Programming (Translation to Russian). Inostrannaya Literatura, Moscow (1960)
3. Dobrushin, R.L.: The general formulation of the fundamental theorem of Shannon in the theory of information. Usp. Mat. Nauk 14(6) (1959, in Russian)
4. Grishanin, B.A., Stratonovich, R.L.: The value of information and sufficient statistics when observing a stochastic process. Izv. USSR Acad. Sci. Tech. Cybern. 6, 4–12 (1966, in Russian)
5. Jahnke, E., Emde, F.: Tables of Functions with Formulae and Curves. Dover Publications, New York (1945)