Крокодил, 1923 , № 09
Krokodil Magazine
Наука и жизнь #12 1993
Nauka i Zhizn Magazine
The Secret Explorers and the Smoking Volcano
SJ King
The Secret Explorers (6)
Крокодил, 1938 , № 33-34
The Alpha Centauri Project (Thinking worlds)
Marco Santini