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Are multiplet free atoms multireference?

Open shell atoms are multireference pretty much by definition. Take fluorine, for example, which has a $1s^2 2s^2 2p^5$ electron configuration and a $^2P$ ground state. We know that the electronic ...
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Textbooks for electronic structure theory

I read Electronic Structure Basic Theory and Practical Methods by Richard M. Martin, University of Illinois, Urbana-Champaign. Here is the link Electronic structure
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