1. Public Investment, the Rate of Return and Optimal Fiscal Policy;Arrow,1970
2. Proof for a case where discounting advances the doomsday;Koopmans;Rev. Econ. Studies,1974
3. Foundations of Optimal Control Theory;Lee,1967
4. Sufficient conditions for the optimal control of nonlinear systems;Mangasarian;SIAM J. Control,1966
5. The optimum town;Mirrlees;Swedish J. Econ.,1972