1. R. Aris, The Optimal Design of Chemical Reactors; A Study in Dynamic Programming, Academic Press, New York, 1961.
2. K. J. Arrow, S. Karlin and H. Scarf, Studies in the Mathematical Theory of Inventory and Production, Stanford University Press, Stanford, California, 1958.
3. N. I. Akhiezer, The Calculus of Variations (trans, by A. H. Frink), Blaisdell, Waltham, Mass., 1962.
4. On the “bang-bang” control problem
5. Variational methods in problems of control and programming