Confirming the Importance of Simma's Summa

A quick review of Getting Started with UN Charter Research in the Charter of the United Nations (1945) Research Guide (from the Research Guides at United Nations Dag Hammarskjöld Library) confirms the importance of Simma's Summa in this field. Simma's Summa is my name for the article-by-article UN Charter reference work I introduced in yesterday's post: Exploring My Doubt, Reason, and Faith in a Reforming UN Charter.

Simma's Summa is written in English. There are six official languages of the UN: Arabic, Chinese, English, French, Russian and Spanish. I am not sure if Simma's Summa is available in translation in the other five UN languages. This would be a question for UN librarians.