@online{
   timsrc,
   author = "Keppeler, Stefan",
   title = "Vorlesung Mathematik 1 für Naturwissenschaftler, 27. Stunde",
   publisher = "Universität Tübingen",
   year = "2017",
   month = "Dec",
   day = "08",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20171208_001_mathnat1_0001",
   urldate = "2024-04-16"
}