@online{ timsrc, author = "Agostini, Daniele", title = "Vorlesung Algebraische Strukturen, 20. Stunde", publisher = "Universität Tübingen", year = "2023", month = "Dec", day = "19", url = "https://timms.uni-tuebingen.de:443/tp/UT_20231219_002_ws2324algebstruk_0001", urldate = "2024-11-21" }