| title | ISBN-13 (ISBN-10) | year of publication | |
|---|---|---|---|
| Ethical, Ethological and Legal Aspects of Intensive Farm Animal Management (Tierhaltung Animal Management) | 978-3-7643-1930-4 (3-7643-1930-5) | 1988 | |
| Ethology and Ethics of Farm Animal Production | 978-0-8176-1004-3 (0-8176-1004-9) | 1978 |