Books
| Helleborus Winterroos, Hanneke van Dijk & Harry van Trier Stichting Kunstboek, 2004 |
ISBN 90-5856-146-1 |
| The Gardener’s Guide to Growing Hellebores, Graham Rice & Elizabeth Strangman David & Charles, 1993 |
ISBN 071539973X |
| Hellebores, Brian Mathew Alpine Garden Society, 1989 |
ISBN 0-900048-50-6 |
Video
Images of Ashwood Nursery.