@online{ timsrc, author = "Hanack, Michael AND Häfelinger, Günter", title = "Vorlesung Experimentalchemie II, Organische Chemie, SoSe 1999, 22.04.1999, 5. Stunde", publisher = "Universität Tübingen", year = "1999", month = "Apr", day = "22", url = "https://timms.uni-tuebingen.de:443/tp/UT_19990422_001_chemieorg_0001 ", urldate = "2024-05-14" }