Tunnels
Roderick Gordon & Brian Williams
Крокодил, 1982 , № 14
Krokodil Magazine
Наука и жизнь #07 2000
Nauka i Zhizn Magazine
Наука и жизнь #08 1963
The Scent of Shadows: The First Sign of the Zodiac
Vicki Pettersson
Signs of the Zodiac (1)