Microsoft Academic
Microsoft Academic is free public tool for academic publications. Microsoft Academic employs advances in machine learning, semantic inference and knowledge discovery to help you explore scholarly information in more powerful ways than ever before. Reviews by bibliometricians suggest the new Microsoft Academic Search is a competitor to Google Scholar, Web of Science, and Scopus for academic research purposes as well as citation analysis. The service replaces the earlier Microsoft research project, Microsoft Academic Search, which ended development in 2012.