Крокодил, 1976 , № 09
Krokodil Magazine
Крокодил, 1930 , № 36
Наука и жизнь #02 1980
Nauka i Zhizn Magazine
Instinct
Jeremy Robinson
The Scent of Shadows: The First Sign of the Zodiac
Vicki Pettersson
Signs of the Zodiac (1)