I conduct a research related to the nexus of nationalist groups and organized crime in Turkey. I will try to focus on the aims and roots (state, gladio or other factors as organized crime ) of the nationalist groups.
Hello Namig Karimov ; It is a very broad topic but for starters here are some sources:
Tugal, C., 2016. In Turkey, the regime slides from soft to hard totalitarianism. Open Democracy, 17. http://www.mondialisations.org/medias/pdf/In-Turkey-the-regime-slides-from-soft-to-hard-totalitarianism.pdf
"The Grey Wolves conquering Europe". MENA Research & Study Center. 30 June 2020. Retrieved 2 November 2020. https://mena-studies.org/the-grey-wolves-conquering-europe/
Sullivan, Colleen (2011). "Grey Wolves". In Martin, Gus (ed.). The SAGE Encyclopedia of Terrorism (2nd ed.). Sage Publications. pp. 236–7. https://books.google.com/books?id=I_jh4VBi_HYC&pg=PA236&dq=Grey+Wolves
Don’t ignore Wikipedia as a starting point! There are 143 external sources listed under the main article.