@Book{Lommel1888,
author  = "Lommel, Eugen von",
title   = "Die Photometrie der diffusen Zurückwerfung",
year    = "1888",
address = "München",
series  = "Sitzungsberichte",
volume  = "1887,9",
url     = "https://publikationen.badw.de/de/003392474",
}