* {{cite book | last=Hamilton | first=Daniel Sheldon | last2=Meister | first2=Stefan | title=The Eastern Question | publisher=Center for Transnational Relations, The Paul H. Nitze School of Advanced International Studies, Johns Hopkins University | publication-place=Washington, D.C | date=2016 | isbn=978-0-9907720-9-5 | oclc=on1005846816}}
<ref name="p991">{{cite book | last=Hamilton | first=Daniel Sheldon | last2=Meister | first2=Stefan | title=The Eastern Question | publisher=Center for Transnational Relations, The Paul H. Nitze School of Advanced International Studies, Johns Hopkins University | publication-place=Washington, D.C | date=2016 | isbn=978-0-9907720-9-5 | oclc=on1005846816 | page=}}</ref>