R. B · R. Bertram · Rüdiger Bertram
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Coolman i ja | 978-83-63579-02-9 (83-63579-02-5) | 2012 |
| Coolman i ja III. Mega kino | 978-83-63579-31-9 (83-63579-31-9) | 2013 |
| Coolman i ja Ratuj sie kto moze | 978-83-63579-09-8 (83-63579-09-2) | 2012 |