@online{ timsrc, author = "Christen, Dines", title = "Symmetrie in Wissenschaft und Kunst I - Symmetrie und Symmetriebruch in Molekülen", publisher = "Universität Tübingen", year = "2002", month = "Jan", day = "14", url = "https://timms.uni-tuebingen.de:443/tp/UT_20020114_001_symmetrie_0001", urldate = "2024-12-03" }