@online{ timsrc, author = "Lubich, Christian", title = "Vorlesung Numerik, 39. Stunde", publisher = "Universität Tübingen", year = "2023", month = "Jan", day = "09", url = "https://timms.uni-tuebingen.de:443/tp/UT_20230109_001_ws2223numerik_0001", urldate = "2024-12-13" }