@Book{Haerdtl1892,
author  = "Haerdtl, Eduard (Freiherr von)",
title   = "Skizzen zu einem speciellen Fall des Problems der drei Körper",
year    = "1892",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 17, Abth. 3 = [11]",
url     = "https://publikationen.badw.de/en/003083059",
}