Крокодил, 1934 , № 09
Krokodil Magazine
Техника - молодежи №02 1959
Tekhnika Molodezhi Magazine
Наука и жизнь #09 1972
Nauka i Zhizn Magazine
ONLINE THE NEEDS OF THE MANY
Michael A. Martin
Encala
T.M. Nielsen
Equites : Book 4 of the Heku Series
Heku : Book 1 of the Heku Series