Peterburgskie Rabochie nakanune pervoĭ russkoĭ Revoli︠u︡t︠s︡ii / 
Semanov, Sergei Nikolaevich.
Serbina, K. N.
Moskva :  Akademii︠a︡ Nauk SSSR, Leningradskoe Otdelenie Instituta Istorii, 
1966.