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Stable adaptive schemes for system identification and control -- Parts I \& II. IEEE Trans. Systems Man Cybernet. SMC-4 (1974), 541-560.
MR 0392087
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A new adaptive law for robust adaptation without persistent excitation. IEEE Trans. Automat. Control AC-32 (1987), 134-145.
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Zbl 0617.93035
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Stable adaptive controller design-direct control. IEEE Trans. Automat. Control AC-23 (1978), 570-583.
Zbl 0389.93025