@online{ timsrc, author = "Lubich, Christian", title = "Vorlesung Numerik, 31. Stunde", publisher = "Universität Tübingen", year = "2021", month = "Jan", day = "26", url = "https://timms.uni-tuebingen.de:443/tp/UT_20210126_001_ws2021numerik_0001", urldate = "2024-03-28" }