@Book{Hartig1895,
author  = "Hartig, Robert",
title   = "Ueber den Drehwuchs der Kiefer",
year    = "1895",
address = "München",
series  = "Sitzungsberichte",
volume  = "1895,10",
url     = "https://publikationen.badw.de/de/003391817",
}