annoviko / pyclustering

pyclustering is a Python, C++ data mining library.

Home Page:https://pyclustering.github.io/

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Reference for the "Elbow length" method?

kno10 opened this issue · comments

The documentation of the elbow package suggests this is based on the reference Thorndike 1953:

@details Implementation based on paper @cite article::cluster::elbow::1.

@article{article::cluster::elbow::1,
author = "Thorndike, Robert L.",
title = "Who belongs in the family?",
journal = "Psychometrika",
year = "1953",

Yet, I cannot find the "Elbow length" equation used in this reference, in fact he appears very skeptical that such elbows can be reliably identified (for a good reason...).
Is there another reference for this particular method?