1. Mehra, R.K., “Frequency-Domain Synthesis of Optimal Inputs for Linear System Parameter Estimates”, TR 645, Division of Engineering and Applied Physics, Harvard University, July 1973. Also, ASME Journal of Dynamic Systems, Measurement and Control, pp. 130–138, June 1976.
2. “Optimal Inputs for Linear System Identification”;Mehra;IEEE Trans. Automatic Control,1974
3. “Application of Optimal Input Synthesis to Aircraft Parameter Identification”;Gupta;ASME Journal of Dynamic Systems, Measurement and Control,1976
4. Goodwin, G.C. and R.L. Payne, “Design and Characterization of Optimal Test Signals for Linear Single Input Single Output Parameter Estimation”, 3rd IFAC Symposium on Identification, Hague, June 1973.
5. “Identification in Control and Econometrics; Similarities and Differences”;Mehra;Annals of Social and Economic Measurement,1974