@online{
   timsrc,
   author = "Langfeld, Kurt Albert",
   title = "Symmetrie in Wissenschaft und Kunst I - Von der Symmetrie zum Naturgesetz ",
   publisher = "Universität Tübingen",
   year = "2001",
   month = "Nov",
   day = "19",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20011119_001_symmetrie_0001",
   urldate = "2024-04-30"
}