@online{ timsrc, author = "Lubich, Christian", title = "Vorlesung Numerik, 44. Stunde", publisher = "Universität Tübingen", year = "2021", month = "Feb", day = "23", url = "https://timms.uni-tuebingen.de:443/tp/UT_20210223_002_ws2021numerik_0001", urldate = "2024-12-21" }