Brentjes, Sonja Department Artifacts, Action, Knowledge, Max Planck Institute for the History of Science, Max Planck Society;
https://referenceworks.brillonline.com/entries/encyclopaedia-iranica-online/*-COM_12367 (全文テキスト(全般))
Brentjes, S. (2020). Ketab al-Tafhim. In E., Yarshater (Ed.), Encyclopedia iranica. Vol. XVI (Revised bound, pp. 413-416). New York, NY: Encyclopaedia Iranica Foundation.