google http://scholar.google.com/advanced_scholar_search
dblp http://www.informatik.uni-trier.de/~ley/db/indices/query.html
arizona http://dlist.sir.arizona.edu/perl/search/advanced
cambridge https://www.publications.cl.cam.ac.uk/perl/search/advanced
citebase http://www.citebase.org/
diva-portal http://www.diva-portal.se/
elsevier http://www.elsevier.com/wps/find/advproductsearch.cws_home?action=product_search&search=no
iastate http://archives.cs.iastate.edu/perl/advsearch
ingentaconnect http://www.ingentaconnect.com/search/advanced
isis http://www.isis.ecs.soton.ac.uk/pubs/advancedsearch/
nrel http://nrelpubs.nrel.gov/Webtop/ws/nich/www/public/SearchForm
osti http://www.osti.gov/bridge/advancedsearch.jsp
soton http://eprints.ecs.soton.ac.uk/perl/search/advanced
usgs http://pubs.er.usgs.gov/usgspubs/index.jsp?view=adv
