Price, Percival. “The Carillons of the Cathedral of Peter and Paul in the Fortress of Leningrad”. The Galpin Society Journal: Vol 17, pp. 64 – 76. The Galpin Society, 1964. (Web. 1 May 2019). https://www.jstor.org/stable/841315?seq=1#metadata_info_tab_contents
Slavnitskiy, Nikolai. “Russian Generals Imprisoned in the Peer and Paul Fortress in 1917”. Otechestvennaia istoriia, pp. 69 – 76. Volgogradskii Gosudarstvennyi Universitet, 2017. (Web. 1 May 2019). https://hfrir.jvolsu.com/index.php/en/component/attachments/download/1560
Ivanova, Natalia. “The euphoria of the initial period of the First World War and the first stage of the ‘struggle against German domination’”. Petrograd: First World War (1914–1918), pp 159 – 172. Cairn.Info, 2014. (Web. 1 May 2019).
https://www.cairn.info/revue-cahiers-bruxellois-2014-1E-page-159.htm#
Internet Archive. “Peter and Paul Fortress”. Internet Archive: Way Back Machine. Saint-Petersburg.com, 2008. (Web. 1 May 2019).