The main search results in DISCOVER now include results supplied directly from:
ScienceDirect (from 2005 onwards)
Web of Science Arts & Humanities Citation Index (from 1976)
Web of Science Social Science Citation Index (from 1930)
Web of Science Science Citation Index (from 1900)
JSTOR Arts & Sciences I
Further JSTOR collections will be added to DISCOVER shortly (and of course in the meanwhile a high proportion of the articles in JSTOR are present in DISCOVER through other sources).
With these collections, clicking on the article title will take you to the full record in DISCOVER as normal, but next to the find it @liverpool SFX link there is a direct link to the full text on ScienceDirect or JSTOR, or the full record on Web of Science.