Portal WOS. Portal FECYT Web of Science.
Journal of Citations Report - JCR® - ISI Web of Knowledge (only authorized academic sites) or use this other links: link1 link2
The Erdös Number Project. Compute your Erdös Number at MathSciNet (only authorized academic sites)
DLMF. NIST Digital Library of Mathematical Functions.
ITER. The way to the new energy
JPL. NASA Jet Propulsion Laboratory. California Institute of Technology.
A Hombros de Gigantes (On the Shoulders of Giants) Radio 5 Todo Noticias. RNE. Listen (in spanish) here the last podcast.
eprintweb. An e-print service in the fields of physics, mathematics, non-linear science, computer science, and quantitative biology. It consists of e-print records which can be browsed and searched.