1. A consideration of the discrete Volterra-series;Alper;IEEE-Trans. AC,,1965
2. On selftuning regulators;Åström;Automatica,,1973
3. Verfahren zur On-line Optimierung des statischen Verhaltens nichtlinearer, dynamisch träger Prozesse;Bamberger,1978
4. The use of func-tionals in the analysis of nonlinear physical systems;Barret;Journal of Electronic Control,,1963
5. Digital parameter adaptive control of a pH-process;Bergmann,1980