DUINDAM, Jeroen. Dynasties A Global History of Power, 1300–1800. [s.l.]: Cambridge University Press, 2016. Dostupné online. ISBN978-1-107-06068-5. S.196. (anglicky) Dikici, 'Making of Ottoman court eunuchs', makes clear that white eunuchs could be recruited among devshirme boys, with the pages and their eunuch supervisors coming from the same background. They were sometimes castrated in the palace, whereas the harem's black eunuchs were more often castrated in their region of origin..
JEFFERSON, John. The Holy Wars of King Wladislas and Sultan Murad: The Ottoman-Christian Conflict from 1438–1444. [s.l.]: BRILL, 2012. Dostupné online. ISBN978-90-04-21904-5. S.13. (anglicky)
Orientalski otdel. Inventory of Ottoman Turkish documents about Waqf preserved in the Oriental Department at the St. Cyril and Methodius National Library: Registers. [s.l.]: Narodna biblioteka "Sv. sv. Kiril i Metodiĭ", 2003. Dostupné online. ISBN9789545230721. S.243. (anglicky) Sehabeddin Pasa, devshirme conscript..
