@misc{_Petra.,
 copyright={Copyright by Barbara Szubert},
 howpublished={online},
 publisher={Instytut Studiów Klasycznych, Śródziemnomorskich i Orientalnych},
 language={eng},
 language={pol},
 title={Petra. From a Nabataean centre to a byzantine periphery},
 keywords={Petra, Nabataeans, ancient pre-islamic Arabia, Roman empire, Byzantine empire},
}