Below are some examples of international case-law, and how they can be handled in Zotero. They are not intended to be the only way to handle these types of documents, but rather a starting point that can be adapted.
International Court of Justice
Citation using the Zotero European Journal of International Law style:
Legal Consequences for States of the Continued Presence of South Africa in Namibia (South West Africa) notwithstanding Security Council Resolution 276 (1970) (Advisory Opinion), 21 June 1971, I.C.J. Reports (1971) 12.
International Criminal Tribunals
Citation in Zotero European Journal of International Law style:
Tadic Case (Judgment), 26 January 2000, ICTY-94-1.