| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Group Extensions, Representations, and the Schur Multiplicator | 978-3-540-11954-8 (3-540-11954-X) | 2008 | F. Rudolf Beyl | |
| Group Extensions, Representations, and the Schur Multiplicator: Lecture Notes in Mathematics | 978-0-387-11954-0 (0-387-11954-X) | 1983 | " |