- This is a very good blog post, explaining SOM in simple language: http://www.ai-junkie.com/ann/som/som1.html
- A brief introduction on SOM: https://en.wikipedia.org/wiki/Self-organizing_map
-
The seminal paper by Kohonen on SOM: "The self-organizing map." Neurocomputing 21.1 (1998): 1-6: https://pdfs.semanticscholar.org/8c6a/aea3159e9f49283de252d0548b337839ca6f.pdf