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Notes from Niklas Luhmann's slip box lay in Bielefeld, Germany, 29 June 2011. Until recently, Luhmann's legendary slip box was off-limits for scientists and scholars. 13 years after the death of the
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Luhmann's Slip Box -- What can we Learn from the Device for Knowledge Representation in Requirements Engineering? | Semantic Scholar
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Zettelkästen | Arno Schmidt's collection of index card notations used in the writing of Zettels Traum | Productive things to do, Index cards, Commonplace book
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My Zettelkasten: An Author's Digital Slip-Box Method Example (Using Plain-Text Software) – Love Your Work, Episode 250
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Understanding Zettelkasten — What does it mean to communicate with the slip- box | by Eva Thomas | Medium
![Dr Raul Pacheco-Vega on Twitter: "Somebody (I can't honestly recall whom) recommended “How to Take Smart Notes” to me. I purchased it and read it this morning. Ahrens basically summarizes Niklas Luhmann's Dr Raul Pacheco-Vega on Twitter: "Somebody (I can't honestly recall whom) recommended “How to Take Smart Notes” to me. I purchased it and read it this morning. Ahrens basically summarizes Niklas Luhmann's](https://pbs.twimg.com/media/EmWiJ9bW8AIIVwi.jpg)