| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1979 |
|
Protector | Orbit / Futura | Novel | |
| 1980 |
|
Protector | Orbit | Novel | |
| 1980 |
|
Solar Wind | Perigee Paper Tiger | Nonfiction | 64 |
| 1980 |
|
Solar Wind | Paper Tiger | Nonfiction | 64|64.2 |
| September 1980 |
|
Die Terranauten, #29: Invasion der toten Seelen | Bastei | MAGAZINE | |
| June 1983 |
|
Il veleno di Argo | Fanucci Editore | Novel | |
| 1985 |
|
Protector | Orbit | Novel | |
| 1989 |
|
Protector | Orbit | Novel | |
| 1994 |
|
Solar Wind | Paper Tiger | Nonfiction | 64|64.2 |
| 1996 |
|
Protektor | United Fans / Klub Julese Vernea | Novel | |
| May 1996 |
|
Beschermers van Ringwereld | Meulenhoff | Novel | |
| August 1996 |
|
Beschermers van Ringwereld | Meulenhoff | Novel |