@Book{Laugwitz1960,
author  = "Laugwitz, Detlef",
title   = "Eine Einführung der delta-Funktionen",
year    = "1960",
address = "München",
series  = "Sitzungsberichte",
volume  = "1959,4",
url     = "https://publikationen.badw.de/de/003384004",
}