TY - BOOK AU - Hannikainen,Lauri TI - Peremptory norms (jus cogens) in international law: historical development, criteria, present status T2 - University of Lapland publications in law, SN - 9516403948 U1 - 341.37 20 PY - 1988/// CY - Helsinki PB - Finnish Lawyers' Pub. Co. KW - Treaties KW - Customary law, International KW - International obligations KW - Jus cogens (International law) N1 - Extra t.p. with thesis statement inserted; Includes index; Thesis (Ph.D.)--University of Lapland, 1988; Bibliography: p. 728-776 ER -