The h-index will never be greater than the number of papers the author has published; to have an h-index of 20, the author must have published at least 20 articles w hich have each been cited at least 20 times.An H-Index of 20 or higher is often considered good for mid-career researchers. Senior Researchers: An H-Index of 40 or more is typically considered excellent for researchers with long, established careers.