1. System Identification - A Survey;Astrom;IFAC Journal Automatica,1971
2. Proc. 3rd IFAC Symposium on Identification, The Hague, 1973.
3. Proc. 2nd IFAC Symposium on Identification, Prague, 1970.
4. An Asymptotic Unbiased Recursive Identifier for Linear Systems;Landau,1974
5. Die minimale Ein-Ausgangs-Beschreibung von Mehgrossensystemen;Ackermann;Regenlungstechnik,1971