Professor Yutaka Arai had recently an article published by Oxford University Press in the Journal of Conflict and Security Law.
This is a book review of:
Etienne Henry (2016) Le Principe de nécessité militaire – Histoire et actualité d’une norme fondamentale du droit international humanitaire. Paris: Edition A. Pedone.
You can access the abstract here:
https://academic.oup.com/jcsl/article-abstract/22/3/563/4566153
You can access the article (free access) here:
https://academic.oup.com/jcsl/article/22/3/563/4566153?guestAccessKey=c7425d8b-aed9-4913-bdf9-aeed55d4cdd0