These are the best databases for beginning your research.
An electronic archive and distribution server for research articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance and statistics. Free to use, it is maintained and operated by the Cornell University Library with guidance from the arXiv Advisory Boards. Users can retrieve papers from arXiv and registered authors can submit their articles to arXiv.
Indexing and abstracts for academic journals, professional publications, and other reference sources in engineering, computer theory and new technologies.
Full text for hundreds of science encyclopedias, reference books, periodicals and other sources.
Indexing and abstracting for physics, astronomy, and engineering journals and conference proceedings, including the publications of the American Institute of Physics: Physics Today, Journal of Applied Physics, Applied Physics Letters, and The Journal of Chemical Physics.
Index to articles in scholarly journals and conference proceedings from all fields of study, plus the ability to search these articles' bibliographies by cited author or work. Links to full text are included where possible.