1. Least-squares estimation: from Gauss to Kalman;Sorenson;IEEE Spectrum,1970
2. Linear and nonlinear filtering;Bucy,1970
3. Three decades of filtering theory;Kailath,1972
4. A new approach to linear filtering and prediction problems;Kalman;Basic Engng,1960
5. A proposed stagewise differential correction procedure for satellite tracking and prediction;Swerling;Astronaut. Sci.,1959