1. Return-difference matrix properties for optimal stationary discrete Kalman filter;Arcassoy,1971
2. Return-difference matrix properties for optimal stationary Kalman-Bucy filter;MacFarlane,1971
3. Correspondence — Two necessary conditions in the frequency domain for the optimality of a multiple-input linear control system;MacFarlane,1970
4. The optimal return-difference matrix;Grimble,1977
5. Optimal control of linear systems with crossproduct weighting;Grimble,1979