Rytsarʹ knigi : ocherki zhizni i dei︠a︡melʹnosti P. P. Soikina /
Admiralʹskii, Aleksei Mikhailovich.
Belov, Sergeĭ Vladimirovich.
Soikin, Petr Petrovich.
Leningrad :  Lenizdat, 
1970.