This database is a core science resource, covering all aspects of scientific literature. It also has a number of tools that make it a unique resource for finding scholarly literature.
arXiv is an open-access electronic archive and distribution server for research articles in physics, mathematics, computer science, nonlinear sciences, quantitative biology and statistics.
IEEE Xplore Digital Library includes access to the full text of IEEE content published since 1988 with select content published since 1872 from IEEE journals, transactions, and magazines, IEEE conference proceedings.