@misc{Poppe_Andrzej_(1926–2019)_Ruś_1978,
 author={Poppe, Andrzej (1926–2019)},
 volume={85},
 editor={Institute of History of the Polish Academy of Sciences},
 number={1},
 copyright={Rights Reserved - Free Access},
 address={Warszawa},
 journal={Kwartalnik Historyczny},
 howpublished={online},
 year={1978},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Ruś i Bizancjum w latach 986-989},
 URL={http://rcin.org.pl/Content/30838/PDF/WA303_36332_A52-KH-R-85-1_Poppe.pdf},
 keywords={Christianity - Kievan Rus, Kievan Rus - 11th c., Byzantine Empire - relations - Kievan Rus},
}