Full reference OpenMind biblio ref
Bulgakov, P.G., A.A. Ahmedov, and E.Y. Yusupov. 1983. Geniy Pereshagnuvshiy Veka. Tashkent.
{ P.G. Bulgakov, A.A. Ahmedov, E.Y. Yusupov, 1983 #10293 }