@Book{Unger1887,
author  = "Unger, Georg Friedrich",
title   = "Die Zeiten des Zenon von Kition und Antigonos Gonatas",
year    = "1887",
address = "München",
series  = "Sitzungsberichte",
volume  = "1887,1,5",
url     = "https://publikationen.badw.de/en/007458533",
}