@online{ timsrc, author = "Haussmann, Helmut", title = "Vorlesung Grundlagen der Marktführerschaft, 7. und 8. Stunde", publisher = "Universität Tübingen", year = "2021", month = "Jul", day = "08", url = "https://timms.uni-tuebingen.de:443/tp/UT_20210708_001_sose21grundmarkt_0001", urldate = "2024-11-25" }