1. “Optimal Control of the Linear Regulator with Constant Disturbances,”;JOHNSON;IEEE Trans. Autom. Control AC-13,1968
2. “Further Study of the Linear Regulator with Disturbances: The Case of Vector Disturbances Satisfying a Linear Differential Equation,”;JOHNSON;IEEE Trans. Autom. Control AC-15,1970
3. “Accommodation of Disturbances in Linear Regulator and Servo-Mechanism Problems,”;JOHNSON;IEEE Trans. Autom. Control (special issue on the “Linear-Quadratic-Gaussian Problem”),1971
4. “Algebraic Solution of the Servo-Mechanism Problem with External Disturbances,”;JOHNSON;ASME Trans., J. Dyn. Syst. Meas. Control,1974
5. 97, No. 2, 161 (1975).