Access to indexes, research tools and articles summaries as well as resource links is free. Institutional subscription gives full access to all articles electronically available. Pay-per-view and a 30-day free trial are also possible.
Access to articles summaries is free. Institutional subscription gives access to all articles available electronically or in a fax format. Pay-per-view access is also possible on an individual, ad hoc basis
Abstracts in most cases are available for free in html format. Search by keywords also offers valuable and comprehensive lists of scholarly articles
External linking is developed through subject-based additional resources, with links to publishers and journals? websites. However, links are classified by subject, not annotated nor selected by a PS expert