If you need to go beyond what UCL holds and conduct a more comprehensive search of what has been published, use these key bibliographies:
Where you see the Findit@UCL icon, click on it to link to the full text.
Sometimes you will see a link to the publisher's site. Unless the article is open access, you might find that you can't reach the full text.
Clicking on the Findit@UCL link instead will link you to the full text via UCL's subscription access, if available.