| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| September 1963 |
|
The Astronauts Must Not Land / The Space-Time Juggler | Ace Books | Omnibus | 5 |
| March 1964 |
|
Urania #330 | Mondadori | MAGAZINE | 3 |
| December 1965 |
|
Ungeheuer am Himmel | Moewig | Novel | 5 |
| 1967 |
|
Atención astronautas: no aterrizar | Vértice | Novel | |
| November 1973 |
|
More Things in Heaven | Dell | Novel | 5 |
| November 1973 |
|
More Things in Heaven | Dell | Novel | 5 |
| September 1976 |
|
Urania #706 | Mondadori | MAGAZINE | |
| 1977 |
|
Kosmisk spegel | B. Wahlström | Novel | |
| April 1977 |
|
Les anges de l'ombre | Presses de la Cité | Novel | 7 |
| 1983 |
|
More Things in Heaven | Hamlyn | Novel | |
| May 1983 |
|
Mehr Dinge zwischen Himmel und Erde | Heyne | Novel | 5 |
| November 1985 |
|
Atterraggio proibito | Mondadori | Novel | |
| February 1987 |
|
More Things in Heaven | DAW Books | Novel | |
| February 1987 |
|
More Things in Heaven | DAW Books | Novel | 5 |
| 1992 |
|
Há mais coisas no céu | Livros do Brasil | Novel | |
| September 2011 |
|
More Things in Heaven | Gateway / Orion | Novel |