In addition to continually working to enhance the visibility of articles on our website, Libertas works with a range of external indexing partners.

Libertas works with a large number of external indexing and database services to maximise the visibility of authors' articles.  Journal homepages contain partial lists of indexes/databases that contain individual journals' content.  To provide certainty to readers and authors we generally only list indexes/databases on journal homepages that we have formal agreements with.  The list below gives all indexing and database services we know to contain one or more journals' content:

• British Nursing Index

• CAB Abstracts

• CABI Global Health

• Chemical Abstracts Service

• Chinese Electronic Periodical Service

• Current Contents/Agriculture, Biology and Environmental Sciences

• Current Contents/Life Sciences

• Directory of Open Access Journals

• EBSCO Academic Search International (formerly Academic Search Complete)

• EBSCO CINAHL Complete

• EBSCO Environment Complete

• EBSCO Health Policy Reference Center

• EMBase

• EMBiology

• EMCare

• Gale Academic OneFile

• Gale Health Reference Centre

• Gale InfoTrac Custom journals

• Gale Resource on the Environment, Energy, and Natural Resources

• General Science Collection

• Google Scholar

• Illustrata-Natural Science

• Illustrata-Technology

• Index Copernicus

• Intute

• IT Academic OneFile - Agriculture Collection Periodical

• Journal Citation Reports/Science Edition

• OAIster

• Open J-Gate

• ProQuest Agriculture

• ProQuest Aquatic Science

• ProQuest Atmospheric Science

• ProQuest Biological Sciences

• ProQuest Computer Science

• ProQuest Engineering

• ProQuest Environmental Sciences

• ProQuest Health & Medical Complete

• ProQuest Materials Science

• ProQuest Natural Sciences

• ProQuest Public Health

• ProQuest SciTech

• ProQuest Technology

• Pubget

• Pubmed

• Pubmed Central

• Science Citation Index Expanded (SciSearch)

• SCOPUS

• Socolar

• Zoological Record

Libertas journals appear in many journal directories including:

• Academic Journals Database

• ChemSpider

• EBSCO A-Z

• HINARI

• JournalSeek

• JournaTOCs

• OAJSE

• Pubshub

• RefSeek

• SafetyLit

• SciNet

• Scirus

• Ulrich's Periodicals

All published articles are archived by CLOCKSS and LOCKSS, and most content is also archived by Pubmed Central to ensure perpetual availability to readers.

CLOCKSS is a venture between the world's leading scholarly publishers and research libraries.  It operates a sustainable, geographically distributed archive to ensure the long-term survival of web-based scholarly publications for the long-term benefit of researchers around the world. To learn more visit the CLOCKSS participants list and read the CLOCKSS press release.  LOCKSS is based at Stanford University Libraries and provides ACM award winning digital preservation of scholarly content.  Like CLOCKSS it is an internationally-distributed archive where libraries around the globe retain all intended content.  

Between 50% to 75% of published articles are currently archived in Pubmed Central, operated by the NIH, and this figure will continue to increase as additional journals are added to Pubmed.  

No. All open access articles are permanently archived by CLOCKSS. Libertas has operated continuously and on a commercially-sustainable basis since 2005, but in the unlikely event that it should cease operation all articles will continue to be permanently available from CLOCKSS, as well as other archives and indexes such as Pubmed.

Where a journal has an impact factor it is displayed on the journal's homepage below the ISSN number. Genuine impact factors are provided by their only official provider, Thomson-ISI.  Journals that do not yet have official impact factors are in preparation to obtain them.  Some journals contain journal metrics information obtained from SCImago based on Scopus data.  This data includes a cites per document indicator SCImago states to be calculated with the same formula as the journal impact factor.  The cites per document indicator should not be considered to be a substitute for an official Thomson-ISI impact factor.

An expanding quantity of our journals have h-indexes calculated by SCImago.  To view SCImago data, which includes a selection of metrics, visit the SCImago website.

Article metrics are available for all articles within approximately 72 hours following publication.  Article metrics are based on data collected on the journal's website and where applicable also from Pubmed Central.  Metrics include HTML and PDF views, views per month, and views per geographical region.  To view this data go to the article's abstract and select the Article Metrics tab.

An OAI-PMH feed is available.  Send an enquiry for further information.