More than ten different models of the electron are presented here. (!!!)
More than twenty models are discussed briefly. (!!!)
Thus, the book gives a complete picture of contemporary theoretical
thinking (traditional and new) about the physics of the electron.
/ The book "What is the Electron?"
Volodimir Simulik. Montreal, Canada. 2005. /
http://redshift.vif.com/BookBlurbs/Electron.htm

All of them are problematical.
So, why we call an electron a simple
elementary particle if it looks not very simple ?
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S