Wentker, Alexander Max Planck Institute for Comparative Public Law and International Law, Max Planck Society;
https://doi.org/10.55317/9781784136017 (Any fulltext)
Wentker, A., Jackson, M., & Hill-Cawthorne, L. (2024). Identifying co-parties to armed conflict in international law: How and why states, international organizations and armed groups become parties to war. Chatham House Research Paper. doi:10.55317/9781784136017.