| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1959 |
|
Urania #205 | Mondadori | MAGAZINE | |
| 1960 |
|
Barrier Unknown | Badger | Novel | |
| June 1960 |
|
Die Union der 2000 Welten | Pabel | Chapbook | |
| April 2015 |
|
Barrier Unknown | Gateway / Orion | Novel |