@online{
   timsrc,
   author = "Haussmann, Helmut",
   title = "Vorlesung Grundlagen der Marktführerschaft, 3. und 4. Stunde",
   publisher = "Universität Tübingen",
   year = "2021",
   month = "May",
   day = "20",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20210520_001_sose21grundmarkt_0001",
   urldate = "2024-04-26"
}