Sokolіuk Serhii M. “The Build-up of Submarine Forces of the Russian Imperial Navy in the Black Sea in 1910-1914”. Scientific Papers of the Vinnytsia Mykhailo Kotsyiubynskyi State Pedagogical University Series History, no. 32, June 2020, pp. 64-73, https://doi.org/10.31652/2411-2143-2020-32-64-73.