@online{ timsrc, author = "Lubich, Christian", title = "Vorlesung Numerik, 18. Stunde", publisher = "Universität Tübingen", year = "2020", month = "Dec", day = "10", url = "https://timms.uni-tuebingen.de:443/tp/UT_20201210_001_ws2021numerik_0001", urldate = "2024-12-27" }