The first Russian expedition to the Amur River (1643–1646).
Geographical discoveries and the expansion of the Russian state's territory. 2. History of Russia (by Ed. Medinsky) prezentatsiia k uchebniku istorii 7 klass 25 paragraf
Causes of failure and the role of P. Lyapunov. The first Russian expedition to the Amur River (1643–1646)