@online{ timsrc, author = "Hauck, Peter", title = "Symmetrie in Wissenschaft und Kunst I - Symmetrie in der Mathematik", publisher = "Universität Tübingen", year = "2001", month = "Nov", day = "12", url = "https://timms.uni-tuebingen.de:443/tp/UT_20011112_001_symmetrie_0001", urldate = "2024-12-13" }