| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Aphidoidea, Hemiptera of Fennoscandia and Denmark: The Families Mindaridae, Hormaphididae, Thelaxidae, Anoeciidae, and Pemphigidae | 978-87-87491-34-1 (87-87491-34-6) | 1980 |
| The Aphidoidea of Fennoscandia and Denmark: The Family Drepanosiphidae | 978-87-87491-44-0 (87-87491-44-3) | 1982 |