"Георги Иванов подаде оставка" (in Bulgarian). chernomorepfc.bg. 21 September 2017. Archived from the original on 21 September 2017. Retrieved 21 September 2017.
"Георги Иванов подаде оставка" (in Bulgarian). chernomorepfc.bg. 21 September 2017. Archived from the original on 21 September 2017. Retrieved 21 September 2017.