1. A comparison of several non-linear filters for reentry vehicle tracking;Mehra;IEEE Trans. Aut. Control,1971
2. An efficient suboptimal decision procedure for associating sensor data with stored tracks in real-time surveillance systems;Sea,1971
3. An optimal tracking filter for processing sensor data of imprecisely determined origin in surveillance systems;Singer,1971
4. New results in optimizing surveillance system tracking and data correlation performance in dense multitarget environments;Singer;IEEE Trans. Aut. Control,1973
5. Adaptive nonlinear filtering for tracking with measurements of uncertain origin;Bar-Shalom,1972