@book { KompetenzmessungundKompetenzentwicklung,
    title = "Kompetenzmessung und Kompetenzentwicklung",
    author = "Ralf {Muellerbuchhof}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103079"
}