by asmecher » Thu Dec 20, 2012 3:02 pm
Hi cristianviza,
Those are loaded from plugins (each is in plugins/blocks). These plugins are configured on Journal Setup, page 5, for each journal. The code that loads it is in lib/pkp/classes/plugins/BlockPlugin.inc.php (via the Templates::Common::LeftSidebar and Templates::Common::RightSidebar hooks, which invoke the "callback" function in BlockPlugin.inc.php).
Regards,
Alec Smecher
Public Knowledge Project Team