Expanded into novel "Tau Zero".
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1967 |
|
Galaxy Magazine, June 1967 | Galaxy Publishing Corporation | MAGAZINE | 8 |
| August 1967 |
|
Galaxy Magazine, August 1967 | Galaxy Publishing Corporation | MAGAZINE | 147 |
| March 2007 |
|
To Outlive Eternity and Other Stories | Baen Books | Collection | 1 |
| March 2007 |
|
To Outlive Eternity and Other Stories | Baen Books | Collection | |1 |
| May 2009 |
|
To Outlive Eternity and Other Stories | Baen Books | Collection | 1 |
| January 2017 |
|
Question and Answer | NESFA Press | Collection | 203 |