@Book{Gordan1888,
author  = "Gordan, Paul",
title   = "Ueber die Bildung der Discriminante einer ternären Form",
year    = "1888",
address = "München",
series  = "Sitzungsberichte",
volume  = "1887,21",
url     = "https://publikationen.badw.de/de/003392494",
}