info:oai:pure.iiasa.ac.at:14041info:ofi/fmt:xml:xsd:journalBellmanR.Bellman, R.CastiJ.Casti, J.28May 19780018-9472Introduction to the Mathematical Theory of Control Processes, Volume I: Linear Equations and Quadratic Criteria, Volume II: Nonlinear ProcessesIEEE Transactions on Systems, Man, and Cybernetics145-145article