I Does anyone have a collection of the Dirac Equations?

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TL;DR Summary
I am basically searching for a good source where Diracs Equasions resulting in negative energy are listed.
I am working on my physics paper and just realized that after explaining everything I did not add the equasion. Now I am wondering where I can find a good source on them, so that I can add them.
 
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It's in any textbook on QFT, e.g.,

M. D. Schwartz, Quantum field theory and the Standard
Model, Cambridge University Press, Cambridge, New York
(2014).
 

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