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2. “Estimation of the State Vector of a Linear Stochastic System with a Constrained Estimator,”;Aoki;IEEE Trans. Automatic Control,1967
3. “A Direct Derivation of the Optimal Linear Filter Using the Maximum Principle,”;Athans;IEEE Trans. Automatic Control,1967
4. “A Statistical Optimizing Navigation Procedure for Space Flight,”;Battin;J. Amer. Rocket Soc.,1962
5. Astronautical Guidance;Battin,1964