Helmut Krinn · Helmut Krohne · Helmuth Kern · Karin Hellandsjo
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Erling Neby Collection /Anglais | 978-88-572-0862-6 (88-572-0862-1) | 2011 |
| The Henie Onstad Art Centre the Art of Tomorrow Today the Collection /Anglais | 978-88-6130-944-9 (88-6130-944-5) | 1999 |