References
- Foerster , Heinz von. 1984 . Observing systems. , 2nd ed. , Salinas, CA : Intersystems Publications .
- Winthrop‐Young , Geoffrey and Wutz , Michael . 1999 . “ Translators’ introduction ” . In Friedrich Kittler, Gramophone, film, typewriter , Edited by: Winthrop‐Young , Geoffrey and Wutz , Michael . xi – xxxviii . Stanford, CA : Stanford University Press .