The first book-length systematic examination of how teachings are used in practice in international law.

Sondre Torp Helmersen is Associate Professor and Vice Dean for Research at the Faculty of Law, UiT The Arctic University of Norway. He has published widely on the sources of international law and other topics in leading journals. Before entering academia he worked at the Norwegian Ministry of Foreign Affairs.

1. Introduction; 2. The ICJ statute article 38(1); 3. The general role of teachings in the ICJ; 4. Variations between works; 5. Variations between judges; 6. Concluding reflections; Appendices; Bibliography; Index.