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- Language: Danish

- Author: Knud E. Løgstrup
- Language: Danish

- Author: Knud Ejler Løgstrup
- Language: Danish
- Year: 1995

System og Symbol
pdf
- Author: Knud Ejler Løgstrup
- Language: Danish
- Year: 1997

- Author: Knud Ejler Løgstrup
- Language: Danish
- Year: 1993

- Author: Knud Ejler Løgstrup, Bjørn Rabjerg, Robert Stern
- Language: English
- Year: 2020

- Author: Knud Ejler Løgstrup, Kees van Kooten Niekerk, K. E. Logstrup
- Language: English
- Year: 2007