@misc{Gil'ferding_Aleksandr_Feodorovič_(1831–1872)_Pis'ma_1859,
 author={Gil'ferding, Aleksandr Feodorovič (1831–1872)},
 copyright={Public Domain},
 address={Moskva},
 howpublished={online},
 year={1859},
 publisher={V Tipografìi Aleksandra Semena},
 language={rus},
 title={Pis'ma ob istorìi Serbov i Bolgar. Vyp. 2},
 type={Text},
 keywords={history of Bulgaria, history of Serbia},
}