@book{id_12,
author = "Otto, Walter and Bengtson, Hermann",
title = "Zur Geschichte des Niederganges des Ptolemäerreiches",
year = "1938",
address = "München",
publisher = "Verl. der Bayer. Akad. der Wiss.",
series = "Abhandlungen",
volume = "17",
url = "http://publikationen.badw.de/de/009798973",
}