The law librarians at NYU have created a new research guide on indigenous peoples and international law. This might be a great starting place if you thinking of writing on this topic. The guide includes "a foundation for researching indigenous international law by covering the definition of "indigenous peoples”, a brief history, key terms and issues, regional and international organizations including the United Nations, international documentation such as treaties, selected books and articles, online sources, and research guides."

Indigenous people and international law -- NYU GlobaLex