@online{ timsrc, author = "Lubich, Christian", title = "Vorlesung Numerik, 9. Stunde", publisher = "Universität Tübingen", year = "2020", month = "Nov", day = "19", url = "https://timms.uni-tuebingen.de:443/tp/UT_20201119_001_ws2021numerik_0001", urldate = "2024-12-27" }