@online{
   timsrc,
   author = "Ammon, Hermann P. T. AND Häfelinger, Günter",
   title = "Chemie an der Schwelle des 21. Jahrhunderts, Studium Generale, WiSe 1999/2000, 19.01.2000",
   publisher = "Universität Tübingen",
   year = "2000",
   month = "Jan",
   day = "19",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20000119_001_chemiering_0001",
   urldate = "2024-11-05"
}