@online{traeinfo,
    author = "Træinformation",
    title = "kursusmateriale om clt",
    url = "https://www.traeinfo.dk/kursusmateriale-om-clt/",
    addendum = "Besøgt: 01.05.2020",
    keywords = "Træinformation",
}

@online{cristobal,
    author = "Wikipedia",
    title = "Cristobal Tapia De Veer",
    url = "https://en.wikipedia.org/wiki/Cristobal_Tapia_de_Veer",
    addendum = "Besøgt: 23 oct 2023",
    keywords = "Cristobal",
}