Max Planck Encyclopedia of Public International Law (BLS subscription database)
Includes over 1,600 articles on key international law topics. Authors are international law scholars or practitioners.
A BLS researcher can access an article and then click the link to: Oxford Law Citator.
Then, one might see:
This item mentions
If so, one can view citations to related decisions, and sometimes link to decisions in the companion subscription product, Oxford Reports on International Law.