I've been looking recently at some papers in physics, from journals that are not listed in mathscinet. Is there is a similar database for physics, with reviews and citation links? I'd like to see where the papers I'm currently looking at have been referenced, in order to follow the subject forward in time.
In addition to freely available Google Scholar and SPIRES, and subscription-based Web of Science and Scopus, there is a free NASA Astrophysics Data Systems database which, contrary to its title, appears to have broader scope than SPIRES, at least as far as mathematical physics is concerned; it provides abstracts (but not reviews), citations, and, for some older papers, their full-text scanned versions. Now it is sort of integrated with arXiv.org: when looking at the abstract of any arXiv preprint, you see the link to its citations and references at NASA ADS under References & Citations. This database has, inter alia, a specialized physics and geophysics search engine.