(19)George Sphrantzes,The Fall of the Byzantine Empire,A Chronicle by G.Sphrantzes,1401-1477,pp.121,124.
    (20)Nicolo Barbaro,Diary of the Siege of Constantinople,1453,p.50.
    (21)希腊史家劳尼库斯·哈利科空迪拉斯(Laonicus Chalcocondylas)作为此次战役的间接记述人，也能为后人提供一些佐证。这段记述使用的版本出自J.P.Migne,Patrologia Graeca 159,cols.375-397，注者还对比了Darko,Budapest，1922年。参见J.R.Melville Jones翻译的The Siege of Constantinople 1453:Seven Contemporary Accounts,pp.50,51.53.
    (22)爱德华·吉本认为，杜卡斯、哈利科空迪拉斯和莱奥纳说的30万或40万人太夸张，斯弗兰齐斯的25.8万比较准确，攻守双方的比例大体为20∶1。Edward Gibbon,The History of the Decline and Fall of the Roman Empire,London:George Bell and Sons,1889,VII,pp.303,307.还有许多作品也提到了这个问题。Geory Ostrogorsky,Byzantinische Geschichte,324-1453,Munchen:Verlag C.H.Beck OHG,1996，《拜占延帝国》，陈志强译，青海人民出版社2006年，第469、402～403页。L.Brebier,The Life and Death of Byzantium,trans.Margaret Vaughan,Amsterdam:North-Holland Publishing Company,1977,pp.364,365.S.Runceman,The Fall of Constantinople,1453,Cambridge:Cambridge University Press,1965,p.76.F.Babinger,Mehmed the Conqueror and His Time,trans.Ralph Manheim,ed.William C.Hickman,Bollingen Series XCVI.Princeton,N.J.:Princeton University Press,1978,p.84.John Freely,Istanbul,the imperial city,London:Penguin Books Ltd.,1996,pp.173,174.W.Treadgold,A History of the Byzantine State and Sociecy,p.799.M.C.Bartusis,The Late Byzantine Army,Arms and Society,1204-1453,p.131.
    (23)George Sphrantzes,The Fall of the Byzantine Empire,A Chronicle by G.Sphrantzes,1401-1477,pp.103,114.
    (24)The Siege of Constantinople 1453:Seven Contemporary Accounts,pp.27,28,29,29,30,38.
    (25)The Siege of Constantinople 1453:Seven Contemporary Accounts,pp.13,19,21,25.
    (26)Nicolo Barbaro,Diary of the Siege of Constantinople,1453,pp.57,55.
    (27)(29)George Sphrantzes,The Fall of the Byzantine Empire,A Chronicle by G.Sphrantzes,1401-1477,pp.118,115.
    (28)The Siege of Constantinople 1453:Seven Contemporary Accounts,pp.30,23.
    (30)Nicolo Barbaro,Diary of the Siege of Constantinople,1453,pp.49,56,61,65.
    (31)George Sphrantzes,The Fall of the Byzantine Empire,A Chronicle by G.Sphrantzes,1401-1477,p.116.