Redin, Dmitry, and Dmitry Serov. “Peter the Great’s Second Voyage to Europe in the Letters of Baron P. P. Shafirov to Prince A. D. Menshikov (1716–1717)”. Quaestio Rossica 5, no. 2 (June 30, 2017): 471-502. Accessed September 17, 2021. https://qr.urfu.ru/ojs/index.php/qr/article/view/229.