Robert Kolb, Peremptory International Law – Jus Cogens: A General Inventory, Hart Publishing, Oxford/Portland: 2015, pp. xvii + 137. PYIL [Internet]. 2016 Dec. 31 [cited 2025 Oct. 4];36:287-90. Available from: https://czasopisma.inp.pan.pl/index.php/pyil/article/view/2620