| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1994 | 978-1-885794-00-0 | Enoch Haga | The 2000-year history of the Haga-Helgøy and Krick-Keller families: Ancestors and descendants |
| '' | 978-1-885794-01-7 | '' | The 2000-year history of the Haga-Helgøy and Krick-Keller families: Ancestors and descendants |
| 2010 | 978-1-885794-34-5 | Henrik O. Lunde | Genealogical Implications of Norwegian Inheritance Laws: 1274 to the Present |