Google Scholar

Google Scholar is a freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines.

Free Web

Microsoft Academic Search

Microsoft Academic Search is an experimental research service developed by Microsoft Research to explore how scholars, scientists, students, and practitioners find academic content, researchers, institutions, and activities.

Free Web

ACI Scholarly Blog Index

ACI is revolutionizing the way people conduct research by enabling them to find the content they’ve been missing.

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Scopus

Scopus is a bibliographic database containing abstracts and citations for academic journal articles.

Commercial Web