How to assign permissions for a group to access certain tickets

In ServiceDesk, I have a group that I want to have access to certain tickets.  I have created a page which contains a report listing these tickets, and given the group access to the page.  So these users can see the list of tickets, however, the group currently has no permissions so they can't open any tickets to view or work them.  What permissions do I need to assign to the group?  I tried assigning just the permissions in the WorkflowTasksManagement category, but then they were able to see other pages that they shouldn't.