1. The control of an elastic fluid;Bateman;Bull. AMS,1945
2. “Inequalities.”;Beckenbach,1961
3. “Stability Theory of Differential Equations.”;Bellman,1953
4. Functional equations in the theory of dynamic programming, V. Positivity and quasilinearity;Bellman;Proc. natl. Acad. Sci. U.S.,1955
5. “Dynamic Programming.”;Bellman,1957