| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Research Guide to Instruments of European Regional Organizations | 978-94-000-0035-3 (94-000-0035-9) | 2010 | Stefaan Smis |
| Research Guide to Instruments of International Organizations | 978-1-78068-100-9 (1-78068-100-3) | 2014 | " |