@Book{Schönbein1861,
author  = "Schönbein, Christian Friedrich",
title   = "Beiträge zur näheren Kenntniss der Nitrification",
year    = "1861",
address = "München",
series  = "Sitzungsberichte",
volume  = "1861,2,8",
url     = "https://publikationen.badw.de/de/003902292",
}