@Book{Gruber1922,
author  = "Gruber, Max von",
title   = "Einige Grundregeln des Stoffwechsels",
year    = "1922",
address = "München",
series  = "Sitzungsberichte",
volume  = "1921,20",
url     = "https://publikationen.badw.de/en/003399249",
}