I see that there are some references in the post PE on the Gribov ambiguity.
However, resolution of this ambiguity, as stated in wiki, is to find the fundamental modular region (FMR).
I looked into the wikipedia page dealing with fundamental domains of modular groups. However, it does not seem to focus on the non-Abelian gauge theories.
Could anyone please suggest any reference focusing on the methods / discussions of finding a fundamental modular region to resolve the Gribov ambiguity for Yang-Mills theories?