@Book{Mittag-Leffler1915,
author  = "Mittag-Leffler, Magnus Gustaf",
title   = "Über einen Satz des Herrn Serge Bernstein",
year    = "1915",
address = "München",
series  = "Sitzungsberichte",
volume  = "1915,19",
url     = "https://publikationen.badw.de/en/020324703",
}