| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Ecoop 91: Conference on Object-Oriented Programming | 978-0-387-54262-1 | 1991 | |
| ECOOP '91 European Conference on Object-Oriented Programming: Geneva, Switzerland, July 15-19, 1991. Proceedings | 978-3-540-54262-9 | 2008 | |
| Parallel Database Systems: PRISMA Workshop, Noordwijk, The Netherlands, September 24-26, 1990. Proceedings. | 978-3-540-54132-5 | 2008 | |
| Parallel Database Systems: Prisma Workshop Noordwijk, the Netherlands, September 24-26, 1990: Proceedings | 978-0-387-54132-7 | 1991 |