Everything works fine when I quote references with
\cite. Eventually I wanted to make a quote author, year and for this I used the package natbib to use
\citep. Suddenly, I had a lot of problems I have not been able to solve.
My headers use the title of the current subsection. That remains the case for the entire document except for chapter bibliographies where the word "References" in the header is written in small capitals. Also, I can not find the author quotes year.
Thank you in advance for your feedback and suggestions.