@online{
   timsrc,
   author = "Lubich, Christian",
   title = "Vorlesung Numerik, 21. Stunde",
   publisher = "Universität Tübingen",
   year = "2020",
   month = "Dec",
   day = "17",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20201217_001_ws2021numerik_0001",
   urldate = "2024-04-19"
}