The SFX links are generated based on presence of an ISSN in the record - VuFind isn't actively communicating with SFX for holdings.
From: Bryon Czoch [mailto:bczoch@...]
Sent: Tuesday, August 06, 2013 3:25 PM
Subject: [VuFind-Tech] SFX Link Resolver Logic
Can anyone tell me why VuFind would show an SFX link on a record when there is no full text?