Strata View

Stratum 1
Service Matches: These resources provide links directly to an article via web-based services.
DOI Proxyhttp://dx.doi.orgMore Info
LinkBatonhttp://www.linkbaton.comMore Info
URLNot AvailableMore Info

Stratum 2
Publication matches: These resources provide a link to the publication in which an article was published.
Academic Radiologyhttp://www.academicradiology.com/More Info
Ariadnehttp://www.ariadne.ac.ukMore Info
Behavioral and Brain Scienceshttp://www.bbsonline.org/More Info
Cortexhttp://www.cortex-online.org/More Info
D-Libhttp://www.dlib.orgMore Info
Information Societyhttp://www.slis.indiana.edu/TIS/More Info
New Journal of Physicshttp://www.njp.org/More Info
Psycoloquyhttp://psycprints.ecs.soton.ac.uk/More Info

Stratum 3
High Probability Matches: These resources search one or many publications, so providing a wider scope than a unique match.
CiteBasehttp://citebase.eprints.orgMore Info
OAIsterhttp://oaister.umdl.umich.edu/o/oaister/More Info

Stratum 4
Low Probability Matches: These resources concentrate on certain subject areas, such as Physics or Computer Science, so are less likely to get an exact match, but may return other articles by the same author or on the same topic
Cogprintshttp://cogprints.ecs.soton.ac.uk/More Info
DLISThttp://dlist.sir.arizona.edu/More Info
Organic Eprintshttp://www.orgprints.orgMore Info
ResearchIndexhttp://citeseer.nj.nec.com/csMore Info
University of Southampton ECS Publicationshttp://eprints.ecs.soton.ac.ukMore Info
VT CS Tech Reportshttp://eprints.cs.vt.edu:8080/More Info
Wisdom Archivehttp://wisdomarchive.wisdom.weizmann.ac.il:81/More Info
arXivhttp://www.arxiv.orgMore Info

Stratum 5
Wide-Ranging Matches: These resources cover a large variety of subjects. These are not displayed unless you have requested them in your preferences (sensible defaults are chosen otherwise).
Googlehttp://www.google.comMore Info
Google Scholarhttp://scholar.google.comMore Info
Scirushttp://www.scirus.comMore Info
Vivisimohttp://www.vivisimo.com/More Info
Zetochttp://zetoc.mimas.ac.ukMore Info