@online{ timsrc, author = "Lubich, Christian", title = "Vorlesung Numerik, 20. Stunde", publisher = "Universität Tübingen", year = "2022", month = "Nov", day = "18", url = "https://timms.uni-tuebingen.de:443/tp/UT_20221118_002_ws2223numerik_0001", urldate = "2024-12-27" }