@Book{Lindemann1919,
author  = "Lindemann, Ferdinand",
title   = "Über die Differentialgleichung y'=Ayp +Byq",
year    = "1919",
address = "München",
series  = "Sitzungsberichte",
volume  = "1919,16",
url     = "https://publikationen.badw.de/en/003395427",
}