Philip Pajakowski, in Michał Bobrzyński (1849-1935), Peter Brock, John D. Stanley, Piotr Wróbel (ed.), Nation And History: Polish Historians from the Enlightenment to the Second World War, University of Toronto Press, 2006, (ISBN0-8020-9036-2), Google Print, p.150
Brian M. Downing, The Military Revolution and Political Change: Origins of Democracy and Autocracy in Early Modern Europe, Princeton University Press, 1992, (ISBN0-691-02475-8), Google Print, p.144