@online{
   timsrc,
   author = "Markwig, Thomas",
   title = "Vorlesung Grundlagen der Mathematik 1, 9. Stunde",
   publisher = "Universität Tübingen",
   year = "2026",
   month = "Oct",
   day = "21",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20261021_001_ws2627grundmathe_0001",
   urldate = "2026-10-23"
}