@Book{Erlenmeyer1870,
author  = "Erlenmeyer, Emil",
title   = "Ueber die Synthese substituirter Guanidine",
year    = "1870",
address = "München",
series  = "Sitzungsberichte",
volume  = "1870,2,23",
url     = "https://publikationen.badw.de/en/003396495",
}