| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Semigroups and combinatorial applications | 978-0-471-04379-9 (0-471-04379-6) | 1979 | ||
| Semigroups. Theory and Applications: Proceedings of a Conference held in Oberwolfach, FRG, Feb. 23 - Mar. 1, 1986 | 978-3-540-19347-0 (3-540-19347-2) | 1988 | Helmut Jürgensen · Hanns J. Weinert | |