@online{ timsrc, author = "Keppeler, Stefan", title = "Vorlesung Mathematik 2 für Naturwissenschaftler, 4. Stunde", publisher = "Universität Tübingen", year = "2018", month = "Apr", day = "19", url = "https://timms.uni-tuebingen.de:443/tp/UT_20180419_002_mathnat2_0001", urldate = "2024-03-19" }