E. Poulsen · Elisa Pellacani · Elke Paulussen
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Smiling Bears: A Zookeeper Explores the Behavior and Emotional Life of Bears | 978-1-55365-805-4 (1-55365-805-1) | 2011 |
| Smiling Bears: A Zookeeper Explores the Behaviour and Emotional Life of Bears | 978-1-55365-387-5 (1-55365-387-4) | 2009 |