1. Rivkin, S.S., Ivanovskii, R.I., and Kostrov, A.V., Statisticheskaya optimizatsiya navigatsionnyh sistem (Statistical Optimization of Navigation Systems), Leningrad: Sudostroenie, 1976.
2. Tupysev, V.A., Using Wiener Models for the Description of Gyro Drifts and Measurement Errors in the Problem of Estimation of the State of Inertial Navigation Systems, Giroskopiya i Navigatsiya, 2002, no. 3, pp. 23–33.
3. Garcia Soto, G., Mendes, E., and Razek, A., Reducedorder Observers for Rotor Flux, Rotor Resistance and Speed Estimation for Vector Controlled Induction Motor Drives Using the Extended Kalman Filter Technique, IEE Proc. Electric Power Application, 1999, no. 146(3), pp. 282–288.
4. Aranda, J., De La Cruz, J., Dorminto, S. et al., Reduced-order Kalman Filter for Alignment, Cybernetics and Systems, 1994, no. 25, pp. 1–16.
5. Sims, C., Reduced Order Modeling and Filtering, Control and Dynamic Systems, 1982, vol. 18, pp. 55–103.