References
- Skubiszewski K, ‘Elements of Custom and the Hague Court’, (1971) 31 ZaöRV 810.
- Wolfke K, Custom in Present International Law” (2nd edition 1993).10.1163/9789004636293
- Wolfke K, ‘L’Elément subjectif dans la coutume international’, (1960) 27 Zeszyty Naukowe Uniwersytetu Wrocławskiego, Seria A, Prawo 161.
- Wolfke K, ‘Some Persistent Controversies Regarding Customary International Law’, (1993) Netherlands Yearbook of International Law 24.10.1017/S0167676800000027
- Wolfke K, ‘Treaties and Custom: Aspects of Interrelation’, in J Klabbers, R Lefeber (eds), Essays on the Law of Treaties: A Collection of Essays In Honour of Bert Vierdag (1998).