- In the 1956 "Młody Technik" publication, the author credit is written as: "Wg J. Gurewicza. Opowiadanie to opracował na podstawie powieści radzieckiego pisarza Z. Dąbrowski." ("Based on J. Gurewicz. This story has been prepared by Z. Dąbrowski based on the Soviet writer's novel.") Presumably, "J. Gurewicz" refers to Georgy Gurevich. The exact source novel is not credited, and it is currently unclear if the text of this story is an original creation by Z. Dąbrowski, or a translation from Russian.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| November 1956 | Młody Technik, November 1956 | Państwowe Wydawnictwo Literatury Dziecięcej "Nasza Księgarnia" | MAGAZINE | 26 |