@Book{Pringsheim1911,
author  = "Pringsheim, Alfred",
title   = "Zur Theorie der Heineschen Reihe",
year    = "1911",
address = "München",
series  = "Sitzungsberichte",
volume  = "1911,2",
url     = "https://publikationen.badw.de/en/003395688",
}