@Book{MammitzschRichter1974,
author  = "Mammitzsch, Volker and Richter, Hans",
title   = "Zur Verallgemeinerung eines Satzes von F. Riesz",
year    = "1974",
address = "München",
series  = "Sitzungsberichte",
volume  = "1973,4",
url     = "https://publikationen.badw.de/en/003384327",
}