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* [http://www.hq.nasa.gov/office/pao/History/computers/Ch2-5.html ''Computers in Spaceflight: The NASA Experience''] – By James Tomayko (Chapter 2, Part 5, "The Apollo guidance computer: Hardware")
* Brent Hilpert's [http://madrona.ca/e/corerope/index.html Core Rope & Woven-Wire Memory Systems] page has a detailed explanation of pulse-transformer and switching-core techniques.
* SV3ORA's [http://qrp.gr/coreROM/ Core rope memory: A practical guide of how to build your own] gives a description, schematics and photos of a simple core rope memory board using the pulse transformer technique, including a demonstration of operation.
* [http://www.righto.com/2019/07/software-woven-into-wire-core-rope-and.html Software woven into wire: Core rope and the Apollo Guidance Computer], extensive blog post by computer restoration expert Ken Shirriff
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