@online{
   timsrc,
   author = "Halzen, Francis",
   title = "neutrino astronomy",
   publisher = "Universität Tübingen",
   year = "2013",
   month = "Sep",
   day = "25",
   url = "https://timms.uni-tuebingen.de:443/tp/UT_20130925_001_AG2013_0001",
   urldate = "2024-11-23"
}