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Gell-Mann

https://en.wikipedia.org/wiki/Murray_Gell-Mann

https://scholar.google.com/scholar?oi=gsb90&q=Murray%20Gell%20Mann&lookup=0&hl=en

https://authors.library.caltech.edu/60469/1/PhysRev.95.1300.pdf

https://www.cs.unm.edu/~wjust/CS523/Readings/Gell-Mann.pdf

https://authors.library.caltech.edu/3514/1/FEYpr58.pdf