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https://www.serdarkaya.gen.tr/kitaplik/halil-inalcik-bizans-devleti-ilk-savas-bapheus-koyunhisar-savasi-1302.html
Halil İnalcık | Bizans Devleti İlk Savaş: Bapheus (Koyunhisar) Savaşı (1302)