Andrzej Nowosad
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Andzhey Novosad, 2003, Bulgarya - Oporna toczka na Balkanite. Natzionalen ideal, vanshna politika i mezhdunarodno satrudnichestvo
Andzhey Novosad, 2003, Bulgarya - Oporna toczka na Balkanite. Natzionalen ideal, vanshna politika i mezhdunarodno satrudnichestvo, w: Balgaristichni prouchvanya, tom 9, Faber, Veliko Tarnovo, s. 320-329