1. 1 herbert van de sompel CS 502 Computing Methods for Digital Libraries Cornell University – Computer Science Herbert Van de Sompel herbertv@cs.cornell.edu Lab : Identifiers and services Access to PC orpcuser orpcpw

2. 2 herbert van de sompel Astrophysics Data System Bibcode: http://adswww.harvard.edu/abs_doc/abstract_format.html Journal Abbrevs: http://adsabs.harvard.edu//abs_doc/journal_abbr.html ADS service: check out the importance of BibCode http://adswww.harvard.edu/ Explore abstract service Explore journal article service Link out to external article; look at references Check preferences

3. 3 herbert van de sompel Institute of Physics Publishing http://www.iop.org/EJ/ Go standard service Go to the level of an article Check out references Look at reference links and how they are identified Now go http://www.iop.org/EJ/sfx_cookie?BASE- URL=http://sfxserv.rug.ac.be:8888/rug&Redirect=http://w ww.iop.org/EJ/

4. 4 herbert van de sompel DOI/CrossRef http://www.crossref.org Go Gallery Go IDEAL => Molecular Therapy Check out citation of the article Check out the references, find CrossRef doi-link

5. 5 herbert van de sompel http://www.ams.org/mathscinet/ Do a search Identifiers? How about MS Classification? Go MR Lookup http://www.ams.org/mrlookuphttp://www.ams.org/mrlookup MathSciNet