@ARTICLE{Kwiecień_Roman_Book_2016,
 author={Kwiecień, Roman},
 number={No XXXVI},
 journal={Polish Yearbook of International Law},
 howpublished={online},
 year={2016},
 publisher={Institute of Law Studies PAS},
 publisher={Committee on Legal Sciences PAS},
 type={Recenzje / Book Reviews},
 title={Book Reviews: Robert Kolb, Peremptory International Law – Jus Cogens: A General Inventory, Hart Publishing, Oxford/Portland: 2015, pp. xvii + 137 ISBN: 978-1-78225-727-1},
 URL={http://journals.pan.pl/Content/106661/PDF-MASTER/17_Kwiecien.pdf},
 doi={10.7420/pyil2016q},
}