&quot; Co-operation Agreements and the Law Relating to Agreements Concluded by International Organizations &quot; en Zemanek, Agreements of International Organizations and the Vienna Convention on the Law of Treaties, Vienna: Springer-Verlag (1970), 1-55
&quot; Co-operation Agreements and the Law Relating to Agreements Concluded by International Organizations &quot; in Zemanek ed., Agreements of International Organizations and the Vienna Convention on the Law of Treaties, Vienna: Springer-Verlag (1970) 1 - 55