It is recommended that every cited reference search begin with Web of Science and Google Scholar. While not limiting your search to only these two, it is best to begin here because they tend to be the most comprehensive in their coverage.
Web of Science: Includes a broad selection of prestigious, high impact, academic research journals as well as cited reference searching. Coverage: 1975 - present (updated weekly). Web of Science includes three citation indexes:
Science Citation Index Expanded
Social Sciences Citation Index
Arts & Humanities Citation Index
Google Scholar:Searches for journal articles, books, theses, abstracts and court opinions in a number of disciplines. Sources include academic publishers, professional societies, online repositories and university websites. Oftentimes, there are duplicates and not all citations are from academic journals.