Dear Wolfgang R. Dick , ethics in editorial office, including peer review process, is also very important. COPE has many literature about.
https://publicationethics.org/
To ensure best practice in publication ethics...
Ethics toolkit for a successful editorial office
This guide is a comprehensive toolkit that explains expected ethical practices in scholarly publishing, and highlights resources for editorial offices to develop their codes of ethical conduct so they can define and implement best practices in publication ethics. The toolkit can also be used to prepare an application for COPE membership, by identifying areas in need of development in journal policies and processes to align with COPE’s principles...